Angles and Lines

Front

What is an angle?

Back

An angle is formed by two rays that share a common endpoint, called the vertex.

Front

What is a right angle?

Back

A right angle measures exactly 90 degrees.

Tags

CCSS.4.G.A.1

Front

What is an acute angle?

Back

An acute angle measures less than 90 degrees.

Tags

CCSS.4.G.A.1

Front

What is an obtuse angle?

Back

An obtuse angle 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 measures exactly 180 degrees.

Tags

CCSS.4.G.A.1

Front

What is a line?

Back

A line is a straight path that extends infinitely in both directions.

Tags

CCSS.4.G.A.1

Front

What is a ray?

Back

A ray is a part of a line that has one endpoint and extends infinitely in one direction.

Tags

CCSS.4.G.A.1

Front

What are points?

Back

Points are exact locations in space that have no size or dimension.

Tags

CCSS.4.G.A.1

Front

How do you measure an angle?

Back

An angle is measured in degrees using a protractor.

Tags

CCSS.4.MD.C.6

Front

What is the sum of angles in a triangle?

Back

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

Tags

CCSS.8.G.A.5