1.4 Angle Addition Postulate

Front

What is the Angle Addition Postulate?

Back

The Angle Addition Postulate states that if point B is in the interior of ∠AOC, then m∠AOB + m∠BOC = m∠AOC.

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

If ∠1 and ∠2 form a linear pair, what is true about their measures?

Back

If ∠1 and ∠2 form a linear pair, then m∠1 + m∠2 = 180°.

Front

How do you find the measure of an angle if given an equation?

Back

To find the measure of an angle given an equation, solve for the variable and then substitute back to find the angle's measure.

Front

What is the measure of a straight angle?

Back

The measure of a straight angle is 180 degrees.

Front

What is the measure of a right angle?

Back

The measure of a right angle is 90 degrees.

Front

If m∠K + m∠L = 90°, what can you conclude about ∠K and ∠L?

Back

∠K and ∠L are complementary angles.

Front

If m∠A + m∠B = 180°, what can you conclude about ∠A and ∠B?

Back

∠A and ∠B are supplementary angles.

Front

What is the relationship between angles that form a linear pair?

Back

Angles that form a linear pair are adjacent and their measures add up to 180 degrees.