Sum of Angles in Triangles Review

The measure of the two base angles is 58. Which equation can be used to find the value of x?

• 58 + 2x = 180

• 116 + x = 180

• 58 + x = 180

• 116 + 2x = 180

What is the sum of the angles in a triangle?

• 360

• 90

• 180

• 108

Which equation can be used to find the value of x?

• 39 + 55 + x = 90

• 39 + 55 = 180

• 39 + 55 = 90

• 39 + 55 + x = 180

Which equation can be used to find the value of x?

• 2(72) + 3x = 180

• 72 + 6x = 180

• 72 + 6x = 360

• 2(72) + 6x = 360

Find the value of x.

• 90

• 180

• 15

• 18

Which equation can be used to find the value of x?

• 21x + 12x = 180

• 21x + 12x + 8x = 180

• 21x + 12x = 90

• 21x + 12x + 8x = 90