Classifying Angles

Front

What is an acute angle?

Back

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

Front

What is a right angle?

Back

A right angle is an angle that measures exactly 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 is a straight angle?

Back

A straight angle is an angle that measures exactly 180 degrees.

Front

How do you identify an angle formed by two lines?

Back

The angle formed by two lines is named using the vertex and points on each line, e.g., ∠FED.

Front

What type of angle has a measurement of 25 degrees?

Back

An angle measuring 25 degrees is an acute angle.

Front

What type of angle has a measurement of 90 degrees?

Back

An angle measuring 90 degrees is a right angle.

Front

What type of angle has a measurement of 120 degrees?

Back

An angle measuring 120 degrees is an obtuse angle.

Front

What is the sum of angles in a triangle?

Back

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

Front

What is the relationship between complementary angles?

Back

Complementary angles are two angles whose measures add up to 90 degrees.