Angles - Protractor & Adjacent

Front

What is an angle?

Back

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

Front

What is a protractor used for?

Back

A protractor is a tool used to measure angles in degrees.

Front

What is the measure of a right angle?

Back

A right angle measures 90 degrees.

Front

What is the measure of a straight angle?

Back

A straight angle measures 180 degrees.

Front

What is an acute angle?

Back

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

Front

What is an obtuse angle?

Back

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

Front

What does adjacent angles mean?

Back

Adjacent angles are two angles that share a common side and a common vertex.

Front

How do you find the measure of an unknown angle if you know one angle?

Back

You can subtract the known angle from 180 degrees if they are supplementary or from 90 degrees if they are complementary.

Front

What is the sum of angles in a triangle?

Back

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

Front

If angle A is 90 degrees, what type of angle is it?

Back

Angle A is a right angle.