Solving Missing Angle

Tell whether the angles are complementary or supplementary. Then find the value of x.

• Complementary, 15

• Supplementary, 16

• Complementary, 18

• Supplementary, 19

Which equation could be used to find the missing angle, x?

• 40 + x = 180

• 2x + 40 = 180

• 40 + 2x = 90

• 40 + x = 90

Enter the value of x, in degrees.

(enter only the number)

Which equation could be used to find the value of the missing angle, x?

• 75 + x = 180

• 75 + x = 90

• 75 + 2x = 180

• 75 + 2x = 90

What is the value of x?

(enter only the number)

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

• 80 + 45 + x = 90

• 125 + x = 180

What is the value of x?

(enter only the number)

What is the value of x?

What is the value of x?

(enter only the number)

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

• x(x+20) = 180

• 2x + 20 = 180

• 2x + 20 = 90