Solving for Missing Angle Measures

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?

• x(x+20) = 180

• 2x + 20 = 180

• 2x + 20 = 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)

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

• 6x = 90

• 5x = 90

What is the value of x?

(enter only the number)