Angle addition Postulate

Name the vertex of the angle.

• E

• F

• D

• E, F, and D are vertices

The point where 2 rays meet is called the....

• right angle
• acute angle
• vertex
• congruent

An angle is made up of two _____________ that share a common ________________. 

• rays, endpoint
• endpoint, rays
• vertexes, name
• angles, point

Calculate m∠DEF.

• 180°

• 60°

• 120°

• 80°

Calculate m∠ABC.

• 45°

• 60°

• 105°

• 15°

Find the value of ∠A.

• 25 degrees
• 30  degrees
• 35 degrees
• 90 degrees

Given m∠QST = 135°,

What equation would you use to find x?

• 3x + 1 + 2x - 6 = 135

• 3x + 1 = 2x - 6

• 3x + 1 + 135 = 2x - 6

• 2x - 6 = 135

• 82°

• 128°

• 63°

• 100°

• 43°

• 60°

• 45°

• 26°