Cracking Geometry: Supplementary, Complementary, and Vertical Angles

Light Yellow Arrow
Light Yellow Arrow

Angle Relationships


Supplementary, complementary, and vertical angles are important angle pairs with specific properties.

Supplementary Angles


Two angles that add up to 180 degrees. For example, angles measuring 120° and 60° are supplementary.

Complementary Angles


Angles that add up to 90 degrees. For instance, angles measuring 30° and 60° are complementary.

Vertical Angles


Pairs of opposite angles formed when two lines intersect. They are always congruent (equal). For instance, angles 1 and 3 or angles 2 and 4 in an 'X' formed by intersecting lines are vertical angles.

Online Tutoring


 Explore for comprehensive geometry lessons, practice problems, and expert guidance in mastering angle relationships. Strengthen your math skills today!

Understanding Geometry


Knowing these angle relationships is fundamental for geometry and problem-solving.

Swipe up to visit eTutorWorld and explore more