Adjacent and Vertical Angles
Ever notice how angles form when lines cross each other? These angles have special relationships! Adjacent angles share a common side and vertex (corner point). Think of them like neighbors sharing a fence between their yards.
Vertical angles are opposite angles formed when two lines intersect. The cool thing about vertical angles is they're always congruent - meaning they have exactly the same measurement. This is super helpful when solving geometry problems!
You can identify these angles by their positions. For example, if you have intersecting lines forming angles 1, 2, 3, and 4, angles 1 and 3 would be vertical angles (opposite each other). Angles that share a side, like angles 1 and 2, are adjacent.
Helpful Tip: When identifying adjacent angles, remember they must share both a side AND a vertex. Just being next to each other isn't enough!
