5.2 Angle Measures of Triangles

If you add up every angle, how many degrees are in a triangle?

• 90

• 125

• 180

• 200

Find the value of x.

• 30

• 60

• 100

• 120

Find the value of x.

• 12

• 22

• 102

• 182

Find the value of x.

• 108

• 75

• 32

• 28

Find the value of x.

• 24

• 29

• 31

• 40

Find the value of x.

(Be careful)

• 16

• 25

• 38

• 45

What is the measure of x?

• 101°

• 111°

• 121°

• 131°

Find the indicated angle. (What is ?)

• 91°

• 81°

• 89°

• 109°

Set up an equation to find x.

• 42 + 8x = 2 + 12x

• 2 + 12x + 42 = 8x

• 42 + 8x + 2 + 12x = 180

• 42 + 8x = 180

Set up an equation to find x.

• 42 + 8x = 2 + 12x

• 2 + 12x + 42 = 8x

• 42 + 8x + 2 + 12x = 180

• 42 + 8x = 180