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372
•
May 30, 2023
•
sofi regueira
@sofiregueira
Eighth grade transformationsin mathematics cover essential concepts of geometric... Show more
Reflections, also known as flips, create mirror images of figures across a line of reflection.
Definition: A reflection is a transformation that flips a figure over a line to create a mirror image.
In the coordinate plane, reflections can be performed over the x-axis or y-axis:
Example:
- Reflection over x-axis: →
- Reflection over y-axis: →
Highlight: In a reflection, the original figure and its image are identical.
Rotations involve turning figures around a point called the center of rotation by a specific angle.
Definition: A rotation is a transformation that turns a figure around a fixed point by a certain angle.
In the coordinate plane, rotations about the origin follow specific rules:
Example:
- 90° counterclockwise: →
- 180° rotation: →
- 270° counterclockwise: →
Highlight: In a rotation, the original figure and its image are identical.
Congruent figures have the same size and shape, and can be transformed into each other through rigid motions.
Definition: Rigid motions are transformations that preserve length and angle measure, including translations, reflections, and rotations.
Vocabulary: Congruent figures have congruent angles and congruent sides.
Example: In congruent triangles, corresponding sides and angles are equal.
Dilations change the size of figures while maintaining their shape, with respect to a center of dilation.
Definition: A dilation is a transformation that enlarges or reduces a figure with respect to a fixed point.
In the coordinate plane, dilations are performed by multiplying coordinates by a scale factor:
Example: →
Where k > 1 results in enlargement, and 0 < k < 1 results in reduction.
Highlight: In a dilation, the ratio of side lengths of the image to the original figure is equal to the scale factor.
Similar figures have the same shape but not necessarily the same size, and can be transformed into each other through similarity transformations.
Definition: A similarity transformation is a sequence of dilations and rigid motions.
Highlight: Corresponding angles of similar figures are congruent, and corresponding side lengths are proportional.
The relationship between perimeters and areas of similar figures is based on their scale factor.
Highlight: The ratio of perimeters of similar figures is equal to the ratio of their corresponding side lengths.
Example: For similar triangles ABC and DEF: Perimeter of ABC / Perimeter of DEF = AB/DE = BC/EF = AC/DF
Highlight: The ratio of areas of similar figures is equal to the square of the ratio of their corresponding side lengths.
Example: For similar triangles ABC and DEF: Area of ABC / Area of DEF = ² = ² = ²
Translations are transformations where figures slide without turning. Every point moves the same distance and direction.
Definition: A translation is a transformation that slides a figure without rotating it.
In the coordinate plane, translations are performed by adding values to x and y coordinates:
Example: →
Where a represents horizontal movement and b represents vertical movement. Positive values indicate up/right translations, while negative values indicate down/left translations.
Highlight: In a translation, the original figure and its image are identical.
App Store
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
sofi regueira
@sofiregueira
Eighth grade transformations in mathematics cover essential concepts of geometric transformations, including translations, reflections, rotations, and dilations. This comprehensive guide explores these transformations, their properties, and applications in the coordinate plane, as well as the concepts of congruence and similarity.... Show more
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Reflections, also known as flips, create mirror images of figures across a line of reflection.
Definition: A reflection is a transformation that flips a figure over a line to create a mirror image.
In the coordinate plane, reflections can be performed over the x-axis or y-axis:
Example:
- Reflection over x-axis: →
- Reflection over y-axis: →
Highlight: In a reflection, the original figure and its image are identical.
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Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Rotations involve turning figures around a point called the center of rotation by a specific angle.
Definition: A rotation is a transformation that turns a figure around a fixed point by a certain angle.
In the coordinate plane, rotations about the origin follow specific rules:
Example:
- 90° counterclockwise: →
- 180° rotation: →
- 270° counterclockwise: →
Highlight: In a rotation, the original figure and its image are identical.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Congruent figures have the same size and shape, and can be transformed into each other through rigid motions.
Definition: Rigid motions are transformations that preserve length and angle measure, including translations, reflections, and rotations.
Vocabulary: Congruent figures have congruent angles and congruent sides.
Example: In congruent triangles, corresponding sides and angles are equal.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Dilations change the size of figures while maintaining their shape, with respect to a center of dilation.
Definition: A dilation is a transformation that enlarges or reduces a figure with respect to a fixed point.
In the coordinate plane, dilations are performed by multiplying coordinates by a scale factor:
Example: →
Where k > 1 results in enlargement, and 0 < k < 1 results in reduction.
Highlight: In a dilation, the ratio of side lengths of the image to the original figure is equal to the scale factor.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Similar figures have the same shape but not necessarily the same size, and can be transformed into each other through similarity transformations.
Definition: A similarity transformation is a sequence of dilations and rigid motions.
Highlight: Corresponding angles of similar figures are congruent, and corresponding side lengths are proportional.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
The relationship between perimeters and areas of similar figures is based on their scale factor.
Highlight: The ratio of perimeters of similar figures is equal to the ratio of their corresponding side lengths.
Example: For similar triangles ABC and DEF: Perimeter of ABC / Perimeter of DEF = AB/DE = BC/EF = AC/DF
Highlight: The ratio of areas of similar figures is equal to the square of the ratio of their corresponding side lengths.
Example: For similar triangles ABC and DEF: Area of ABC / Area of DEF = ² = ² = ²
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Translations are transformations where figures slide without turning. Every point moves the same distance and direction.
Definition: A translation is a transformation that slides a figure without rotating it.
In the coordinate plane, translations are performed by adding values to x and y coordinates:
Example: →
Where a represents horizontal movement and b represents vertical movement. Positive values indicate up/right translations, while negative values indicate down/left translations.
Highlight: In a translation, the original figure and its image are identical.
App Store
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE THE SCHOOLGPT. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user
