Types of Angles

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 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 right angle?

Back

A right angle is an angle that measures exactly 90 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

How can you identify an acute angle in a diagram?

Back

An acute angle is identified by its sharpness and measures less than 90 degrees.

Tags

CCSS.4.G.A.1

Front

How can you identify an obtuse angle in a diagram?

Back

An obtuse angle is identified by its wider opening and measures more than 90 degrees.

Tags

CCSS.4.G.A.1

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 the relationship between acute and obtuse angles?

Back

Acute angles are less than 90 degrees, while obtuse angles are more than 90 degrees.

Tags

CCSS.4.G.A.1

Front

Can an angle be both acute and obtuse?

Back

No, an angle cannot be both acute and obtuse at the same time.

Tags

CCSS.4.G.A.1

Front

What is the symbol for an angle?

Back

The symbol for an angle is ∠.