Classifying Angles

Front

What is an angle?

Back

An angle is formed by two rays (sides) that share a common endpoint (vertex).

Front

What is the vertex of an angle?

Back

The vertex is the point where two rays meet to form an angle.

Front

What type of angle measures less than 90 degrees?

Back

An acute angle.

Tags

CCSS.4.G.A.1

Front

What type of angle measures exactly 90 degrees?

Back

A right angle.

Tags

CCSS.4.G.A.1

Front

What type of angle measures more than 90 degrees but less than 180 degrees?

Back

An obtuse angle.

Tags

CCSS.4.G.A.1

Front

What is a straight angle?

Back

A straight angle measures exactly 180 degrees.

Tags

CCSS.4.G.A.1

Front

How do you denote an angle formed by points A, B, and C?

Back

It can be denoted as ∠ABC, where B is the vertex.

Front

What is the sum of angles in a triangle?

Back

The sum of angles in a triangle is always 180 degrees.

Tags

CCSS.8.G.A.5

Front

What is a complementary angle?

Back

Two angles are complementary if their sum is 90 degrees.

Tags

CCSS.7.G.B.5

Front

What is a supplementary angle?

Back

Two angles are supplementary if their sum is 180 degrees.

Tags

CCSS.7.G.B.5