Solving Problems using Angle Relationships

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 a complementary angle?

Back

Complementary angles are two angles whose sum is 90 degrees.

Front

What is a supplementary angle?

Back

Supplementary angles are two angles whose sum is 180 degrees.

Front

If one angle measures 30 degrees, what is its complementary angle?

Back

The complementary angle is 60 degrees.

Front

If one angle measures 120 degrees, what is its supplementary angle?

Back

The supplementary angle is 60 degrees.

Front

What is the relationship between vertical angles?

Back

Vertical angles are equal to each other.

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 is a right angle?

Back

A right angle is an angle that measures exactly 90 degrees.

Front

How do you solve for an unknown angle in a triangle?

Back

To solve for an unknown angle in a triangle, subtract the sum of the known angles from 180 degrees.