Define vertical angles and state their relationship to each other.

Vertical angles are angles opposite one another when two lines intersect. They are always equal to one another.

What is the difference between supplementary and complementary angles?

Supplementary angles add up to 180 degrees, while complementary angles add up to 90 degrees.

Same-side interior angles are supplementary, meaning they add up to 180 degrees.

Grade 12th Grade · Math · 45 min· Ccss 7.g.5

I can apply theorems about special angle pairs to solve problems.

Professor Dave Explains · 7:24

Types of Angles and Angle Relationships

3 key concepts

1
An acute angle is less than 90°, a right angle is exactly 90°, and an obtuse angle is between 90° and 180°.
2
Vertical angles are opposite one another when two lines intersect and are always equal. Supplementary angles are adjacent and add up to 180°.
3
When parallel lines are intersected by a transversal, alternate interior angles, alternate exterior angles, and corresponding angles are equal.

9 questions · Multiple choice & Short answer

Quick comprehension check

“∠A and ∠B are complementary. If m∠A = 68°, what is m∠B?”

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