Front

What is an angle?

Back

An angle is formed by two rays (sides of the angle) that share a common endpoint (the vertex).

Front

What are complementary angles?

Back

Complementary angles are two angles whose measures add up to 90 degrees.

Front

What are supplementary angles?

Back

Supplementary angles are two angles whose measures add up to 180 degrees.

Front

What is a transversal?

Back

A transversal is a line that intersects two or more lines at different points.

Front

What are alternate interior angles?

Back

Alternate interior angles are pairs of angles that are on opposite sides of the transversal and inside the two lines.

Front

What are corresponding angles?

Back

Corresponding angles are pairs of angles that are in the same position on two different lines cut by a transversal.

Front

What is the relationship between parallel lines and angles formed by a transversal?

Back

When a transversal intersects parallel lines, corresponding angles are equal, and alternate interior angles are equal.

Front

If angle ABC = 103°, what is the measure of angle ABD if they are supplementary?

Back

The measure of angle ABD is 77°.

Front

If ray DZ and ray ZP are perpendicular, what is the value of x?

Back

The value of x is 90°.

Front

If angle AOC = 50°, what is the measure of angle BOC if they are vertical angles?

Back

The measure of angle BOC is also 50°.