vertical and adjacent angles flashcard

Front

What are vertical angles?

Back

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

Front

What are adjacent angles?

Back

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

Front

What is the sum of the angles in a triangle?

Back

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

Front

If two angles are complementary, what is their sum?

Back

The sum of complementary angles is 90 degrees.

Front

If two angles are supplementary, what is their sum?

Back

The sum of supplementary angles is 180 degrees.

Front

What is a right angle?

Back

A right angle is an angle that measures exactly 90 degrees.

Front

What is an acute angle?

Back

An acute angle is an angle that measures less than 90 degrees.

Front

What is an obtuse angle?

Back

An obtuse angle is an angle that measures more than 90 degrees but less than 180 degrees.

Front

What is a straight angle?

Back

A straight angle is an angle that measures exactly 180 degrees.

Front

How do you find the measure of an unknown angle if you know one of its adjacent angles?

Back

If you know one of the adjacent angles, subtract its measure from 180 degrees to find the unknown angle.