Angle Relationships

Front

Which two angles are adjacent?

Back

Angles 1 and 2 are adjacent because they share a common side and vertex.

Front

How many degrees is angle x if it is complementary to 130°?

Back

Angle x is 50° because complementary angles add up to 90°.

Front

Complementary angles __________

Back

Complementary angles add to 90 degrees.

Front

When two lines intersect, the angles opposite each other are ________

Back

The angles opposite each other are called vertical angles.

Front

What is the measure of angle x if it is supplementary to 47°?

Back

Angle x is 133° because supplementary angles add up to 180°.

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect, and they are always equal.

Front

What are adjacent angles?

Back

Adjacent angles are two angles that share a common side and vertex.

Front

What is the sum of angles in a triangle?

Back

The sum of angles in a triangle is always 180 degrees.

Front

What are supplementary angles?

Back

Supplementary angles are two angles that add up to 180 degrees.

Front

If angle A is 30°, what is the measure of its complement?

Back

The complement of angle A is 60° because 90° - 30° = 60°.