Types of Angles

Front

What is a supplementary angle?

Back

Two angles that add up to 180 degrees.

Front

What is a complementary angle?

Back

Two angles that add up to 90 degrees.

Front

Define vertical angles.

Back

Angles that are opposite each other when two lines intersect; they are always equal.

Front

If angle A is 50 degrees, what is its supplementary angle?

Back

130 degrees, because 180 - 50 = 130.

Front

If angle B is 30 degrees, what is its complementary angle?

Back

60 degrees, because 90 - 30 = 60.

Front

Identify a pair of vertical angles in the figure: ∠1 and ∠3, ∠2 and ∠4.

Back

∠1 and ∠3 are vertical angles.

Front

What is the relationship between supplementary angles?

Back

They sum up to 180 degrees.

Front

What is the relationship between complementary angles?

Back

They sum up to 90 degrees.

Front

If ∠h is 40 degrees, what is the measure of its vertical angle?

Back

It is also 40 degrees.

Front

If ∠7 is 70 degrees, what is the measure of its vertical angle?

Back

It is also 70 degrees.