Angles Flashcard: Pre-Algebra

Front

What are adjacent angles?

Back

Adjacent angles are two angles that share a common side and a common vertex, but do not overlap.

Front

What is the value of x if the angle measures 118°?

Back

x = 118°

Front

What is the complement of an angle?

Back

The complement of an angle is what, when added to the angle, equals 90°. For example, the complement of 30° is 60°.

Front

What is the supplement of an angle?

Back

The supplement of an angle is what, when added to the angle, equals 180°. For example, the supplement of 42° is 138°.

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always equal.

Front

If angle A measures 30°, what is its complement?

Back

The complement of angle A is 60°.

Front

If angle B measures 42°, what is its supplement?

Back

The supplement of angle B is 138°.

Front

What is the sum of complementary angles?

Back

The sum of complementary angles is always 90°.

Front

What is the sum of supplementary angles?

Back

The sum of supplementary angles is always 180°.

Front

Identify a pair of adjacent angles from the following:

Back