Semester Review Angles & Angle Relationships

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always equal in measure.

Tags

CCSS.7.G.B.5

Front

If m∠1 = 30°, what is m∠3 if ∠1 and ∠3 are vertical angles?

Back

m∠3 = 30° (because vertical angles are equal).

Tags

CCSS.7.G.B.5

Front

Define an angle.

Back

An angle is formed by two rays that meet at a single endpoint, called the vertex.

Tags

CCSS.4.G.A.1

Front

What are complementary angles?

Back

Complementary angles are two angles whose measures add up to 90°.

Tags

CCSS.7.G.B.5

Front

Give an example of complementary angles.

Back

81° and 9° are complementary angles because 81° + 9° = 90°.

Tags

CCSS.7.G.B.5

Front

What are supplementary angles?

Back

Supplementary angles are two angles whose measures add up to 180°.

Tags

CCSS.7.G.B.5

Front

Give an example of supplementary angles.

Back

120° and 60° are supplementary angles because 120° + 60° = 180°.

Tags

CCSS.7.G.B.5

Front

What is the sum of angles in a triangle?

Back

The sum of the angles in a triangle is always 180°.

Tags

CCSS.8.G.A.5

Front

What is a right angle?

Back

A right angle is an angle that measures exactly 90°.

Tags

CCSS.4.G.A.1

Front

What is an acute angle?

Back

An acute angle is an angle that measures less than 90°.

Tags

CCSS.4.G.A.1