Unit 10: Angle Relationships Retest Work

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 the sum of angles in a triangle?

Back

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

Front

What is a vertical angle?

Back

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

Front

What is a linear pair of angles?

Back

A linear pair of angles are two adjacent angles that form a straight line. They are supplementary.

Front

How do you find the measure of an unknown angle in a triangle?

Back

To find an unknown angle in a triangle, subtract the sum of the known angles from 180 degrees.

Front

What is the equation for finding the measure of an angle in a straight line?

Back

The equation is: angle1 + angle2 = 180 degrees.

Front

If x = 18, what is the measure of angle B if angle B = 4x?

Back

The measure of angle B is 72 degrees.

Front

Solve for x: 2x - 2 + 52 + 90 = 180.

Back

x = 20.