Angle Rules -

Front

What do angle rules enable us to calculate?

Back

Unknown angles

Front

What is the sum of angles on a straight line?

Back

180º

Front

What is the sum of angles around a point?

Back

360º

Front

What are supplementary angles?

Back

Two angles that add up to 180º.

Front

What are complementary angles?

Back

Two angles that add up to 90º.

Front

What are vertically opposite angles?

Back

Angles that are opposite one another at a vertex created by two lines crossing.

Front

What is the first step in solving problems involving angles?

Back

Identify which angle you need to find.

Front

What is the second step in solving problems involving angles?

Back

Identify which angle rule(s) apply to the context.

Front

If one angle is 127º, what is the other angle in a pair of supplementary angles?

Back

53º

Front

If one angle is 34º, what is the other angle in a pair of complementary angles?

Back

56º