4th Grade 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 the two rays of an angle meet.

Front

What are the three types of angles?

Back

The three types of angles are acute (less than 90 degrees), right (exactly 90 degrees), and obtuse (more than 90 degrees but less than 180 degrees).

Tags

CCSS.4.G.A.1

Front

What is an acute angle?

Back

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

Tags

CCSS.4.G.A.1

Front

What is a right angle?

Back

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

Tags

CCSS.4.G.A.1

Front

What is an obtuse angle?

Back

An obtuse angle is an angle that measures more than 90 degrees but less than 180 degrees.

Tags

CCSS.4.G.A.1

Front

What is a straight angle?

Back

A straight angle is an angle that measures exactly 180 degrees.

Tags

CCSS.4.G.A.1

Front

What tool is used to measure angles?

Back

A protractor is used to measure angles.

Tags

CCSS.4.MD.C.6

Front

How do you use a protractor?

Back

To use a protractor, align the midpoint with the vertex of the angle and read the measurement where one ray crosses the protractor.

Tags

CCSS.4.MD.C.6

Front

What is the measure of a full rotation?

Back

A full rotation measures 360 degrees.

Tags

CCSS.4.MD.C.5B

CCSS.HSG.CO.A.1