Unit 6 Angles practice

Front

What is an angle?

Back

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

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

What is a straight angle?

Back

A straight angle measures exactly 180 degrees.

Front

What is a full angle?

Back

A full angle measures exactly 360 degrees.

Front

How do you find the missing angle in a triangle?

Back

The sum of the angles in a triangle is always 180 degrees. Subtract the known angles from 180 to find the missing angle.

Front

What is the measure of the missing angle if one angle is 70 degrees and another is 60 degrees?

Back

The missing angle is 50 degrees (180 - 70 - 60 = 50).

Front

What is the measure of the missing angle if one angle is 105 degrees?

Back

The missing angle is 75 degrees (180 - 105 = 75).

Front

What is the measure of the missing angle if one angle is 25 degrees?

Back

The missing angle is 155 degrees (180 - 25 = 155).