Angle Addition Postulate Practice #1 LBJECHS

Front

What is the Angle Addition Postulate?

Back

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

Front

If m∠AOB = 76° and m∠BOC = 80°, what is m∠AOC?

Back

m∠AOC = 76° + 80° = 156°.

Front

What is the measure of an angle that, when added to 86°, equals 180°?

Back

The measure of the missing angle is 94°.

Front

If m∠PQR = 20° and m∠RQS = 160°, what is m∠PQS?

Back

m∠PQS = m∠PQR + m∠RQS = 20° + 160° = 180°.

Front

What is the sum of the measures of angles in a triangle?

Back

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

Front

If m∠A = 79° and m∠B = 90°, what is m∠C in triangle ABC?

Back

m∠C = 180° - (m∠A + m∠B) = 180° - (79° + 90°) = 11°.

Front

What is the relationship between complementary angles?

Back

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

Front

If m∠1 + m∠2 = 90°, what can you say about angles 1 and 2?

Back

Angles 1 and 2 are complementary.

Front

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

Back

Angles A and B are supplementary.

Front

What is the measure of an angle that is supplementary to 134°?

Back

The measure of the supplementary angle is 46°.