warm-up to triangle sum theorem

Front

What is the Triangle Sum Theorem?

Back

The Triangle Sum Theorem states that the sum of the interior angles of a triangle is always 180 degrees.

Front

What are vertical angles?

Back

Angles that are opposite of each other when lines intersect.

Front

What are complementary angles?

Back

Angles that add up to 90 degrees.

Front

What are supplementary angles?

Back

Angles that add up to 180 degrees.

Front

If one angle measures 30 degrees, what is the measure of its complement?

Back

60 degrees.

Front

If one angle measures 120 degrees, what is the measure of its supplement?

Back

60 degrees.

Front

What is the measure of each angle in an equilateral triangle?

Back

Each angle measures 60 degrees.

Front

What is the relationship between the angles in a right triangle?

Back

One angle measures 90 degrees, and the sum of the other two angles is 90 degrees.

Front

If two angles are vertical, what can be said about their measures?

Back

They are equal.

Front

What is the measure of an angle that is supplementary to a 45-degree angle?

Back

135 degrees.