The Pythagorean Theorem is a powerful mathematical tool that helps... Show more
Geometry1,289 views·Updated May 12, 2026·2 pagesExploring Right Triangles: Pythagorean Theorem Practice
violet freeman@violetfreeman
1
of 2
Finding Unknown Sides Using the Pythagorean Theorem
The Pythagorean Theorem helps you find missing sides in right triangles using the formula a² + b² = c². When you know two sides, you can solve for the third by substituting the values and calculating.
For example, if you have a right triangle with legs of 10 and 7, you can find the hypotenuse by solving 10² + 7² = x². This gives you 100 + 49 = x², so x = 12.2. The same approach works when finding a leg - just rearrange the formula to isolate the unknown value.
The theorem also has practical applications in real-world scenarios. For instance, when Scott uses a 12-foot ramp to reach a truck 3.5 feet off the ground, you can find the horizontal distance using the Pythagorean relationship.
Pro Tip: When solving for an unknown side, always check which side is the hypotenuse (the longest side opposite the right angle) before applying the formula. The hypotenuse is always alone on one side of the equation!
2
of 2
The Converse of the Pythagorean Theorem
The converse of the Pythagorean Theorem helps you determine what type of triangle you have based on its side lengths. This relationship is incredibly useful for classifying triangles without measuring angles.
When you have three sides of a triangle, compare the square of the longest side to the sum of squares of the other two sides. If c² = a² + b², you have a right triangle. If c² < a² + b², your triangle is acute (all angles less than 90°). If c² > a² + b², your triangle is obtuse (has one angle greater than 90°).
You can also use the Pythagorean Theorem to solve practical problems, like finding a flagpole's height when you know the length of a wire attached to its top. Or calculating the side length of a square when you know its diagonal length.
Remember: If the three lengths cannot form a triangle at all (when the sum of the two shorter sides is less than the longest side), you'll get "Not a triangle" as your answer!
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Geometry1,289 views·Updated May 12, 2026·2 pagesExploring Right Triangles: Pythagorean Theorem Practice
violet freeman@violetfreeman
The Pythagorean Theorem is a powerful mathematical tool that helps us solve problems involving right triangles. This fundamental concept states that in a right triangle, the square of the hypotenuse equals the sum of the squares of the other two... Show more
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Finding Unknown Sides Using the Pythagorean Theorem
The Pythagorean Theorem helps you find missing sides in right triangles using the formula a² + b² = c². When you know two sides, you can solve for the third by substituting the values and calculating.
For example, if you have a right triangle with legs of 10 and 7, you can find the hypotenuse by solving 10² + 7² = x². This gives you 100 + 49 = x², so x = 12.2. The same approach works when finding a leg - just rearrange the formula to isolate the unknown value.
The theorem also has practical applications in real-world scenarios. For instance, when Scott uses a 12-foot ramp to reach a truck 3.5 feet off the ground, you can find the horizontal distance using the Pythagorean relationship.
Pro Tip: When solving for an unknown side, always check which side is the hypotenuse (the longest side opposite the right angle) before applying the formula. The hypotenuse is always alone on one side of the equation!
2
of 2Sign up to see the content. It's free!
- Access to all documents
- Improve your grades
- Join milions of students
The Converse of the Pythagorean Theorem
The converse of the Pythagorean Theorem helps you determine what type of triangle you have based on its side lengths. This relationship is incredibly useful for classifying triangles without measuring angles.
When you have three sides of a triangle, compare the square of the longest side to the sum of squares of the other two sides. If c² = a² + b², you have a right triangle. If c² < a² + b², your triangle is acute (all angles less than 90°). If c² > a² + b², your triangle is obtuse (has one angle greater than 90°).
You can also use the Pythagorean Theorem to solve practical problems, like finding a flagpole's height when you know the length of a wire attached to its top. Or calculating the side length of a square when you know its diagonal length.
Remember: If the three lengths cannot form a triangle at all (when the sum of the two shorter sides is less than the longest side), you'll get "Not a triangle" as your answer!
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What is the Knowunity AI companion?
Our AI companion is specifically built for the needs of students. Based on the millions of content pieces we have on the platform we can provide truly meaningful and relevant answers to students. But its not only about answers, the companion is even more about guiding students through their daily learning challenges, with personalised study plans, quizzes or content pieces in the chat and 100% personalisation based on the students skills and developments.
Where can I download the Knowunity app?
You can download the app in the Google Play Store and in the Apple App Store.
Is Knowunity really free of charge?
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