Identifying Angles

Front

What is an angle?

Back

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

Front

Name the angle that measures exactly 90 degrees.

Back

Right angle.

Tags

CCSS.4.G.A.1

Front

What do we call an angle that is less than 90 degrees?

Back

Acute angle.

Tags

CCSS.4.G.A.1

Front

What do we call an angle that is more than 90 degrees but less than 180 degrees?

Back

Obtuse angle.

Tags

CCSS.4.G.A.1

Front

What is a straight angle?

Back

An angle that measures exactly 180 degrees.

Tags

CCSS.4.G.A.1

Front

What is a reflex angle?

Back

An angle that measures more than 180 degrees but less than 360 degrees.

Tags

CCSS.4.G.A.1

Front

How do you identify an acute angle?

Back

An acute angle is identified by its measure, which is less than 90 degrees.

Tags

CCSS.4.G.A.1

Front

How do you identify an obtuse angle?

Back

An obtuse angle is identified by its measure, which is more than 90 degrees but less than 180 degrees.

Tags

CCSS.4.G.A.1

Front

What is the vertex of an angle?

Back

The vertex is the point where the two rays of the angle meet.

Front

What are the two rays in an angle called?

Back

The two rays are called the sides of the angle.