Angle Addition Postulate Flashcard

Front

What is the Angle Addition Postulate?

Back

The Angle Addition Postulate states that if point D is in the interior of angle ABC, then m∠ABD + m∠DBC = m∠ABC.

Front

Calculate m∠ABC if m∠ABD = 45° and m∠DBC = 60°.

Back

m∠ABC = 105°.

Front

If m∠RST = (12x - 1)° and m∠RSU = (9x - 15)°, what is the value of x if m∠UST = 53°?

Back

x = 13.

Front

Find m∠RST if m∠RST = (12x - 1)° and x = 13.

Back

m∠RST = 155°.

Front

Find m∠RSU if m∠RSU = (9x - 15)° and x = 13.

Back

m∠RSU = 102°.

Front

What is the measure of a straight angle?

Back

180°.

Front

Calculate m∠DEF if it is a straight angle.

Back

m∠DEF = 180°.

Front

If a right angle is 90°, what is the measure of the complementary angle?

Back

The complementary angle is 90° - m∠A.

Front

Find m∠A if the small box indicates a right angle and m∠A = 90° - 65°.

Back

m∠A = 25°.

Front

Back

m∠CBA = 2 * m∠ABD.