Angle Measurement Study Guide

Front

What is an angle?

Back

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

Front

What is the unit of measurement for angles?

Back

Angles are measured in degrees (°).

Front

How many degrees are in a full circle?

Back

There are 360 degrees in a full circle.

Front

What is a right angle?

Back

A right angle measures exactly 90 degrees.

Front

What is an acute angle?

Back

An acute angle measures less than 90 degrees.

Front

What is an obtuse angle?

Back

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

Front

How do you find the measure of an angle in a circle divided into equal parts?

Back

Divide 360 degrees by the number of equal parts.

Front

If a circle is divided into 12 equal pieces, what is the measure of each angle?

Back

Each angle measures 30 degrees.

Front

What is the measure of a straight angle?

Back

A straight angle measures exactly 180 degrees.

Front

What is the sum of angles in a triangle?

Back

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