The 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 angle AOC, then m∠AOB + m∠BOC = m∠AOC.

Front

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

Back

12x - 1 + 9x - 15 + 53 = 180.

Front

What is the value of x if m∠ABC = 103° and m∠ABD = x + 15°?

Back

x = 15.

Front

If m∠QST = 135°, what equation would you use to find x if m∠QST = 3x + 1 + 2x - 6?

Back

3x + 1 + 2x - 6 = 135.

Front

What is the measure of an angle if its complement is 25°?

Back

The measure of the angle is 65°.

Front

If m∠JKU = 3x - 9 and m∠UKL = 138°, what is the equation to solve for x?

Back

3x - 9 + 138 = 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∠RST = 155°, what is the measure of its supplement?

Back

The measure of the supplement is 25°.

Front

What is the relationship between complementary angles?

Back

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

Front

If m∠ABC = 103°, what is the measure of its supplement?

Back

The measure of the supplement is 77°.