Calculate Missing Angle in Triangle

Finding a missing triangle angle

Plug in the angles we do know

• x + 109 + 32 = 180

• x + 141 = 180

• Subtract 141 from 180

• x = 39^o

Multiple Choice

In a triangle, how many total degrees are there?

• 100%

• 180 degrees

• it varies

• 360 degrees

Multiple Choice

What is a correct equation setup to find the missing Angle?

• 55 + 100 + 180 = x

• 100 - 55 - x = 180

• 100 + 55 + x = 180

• 55 + 100 = x

Steps Simplified

• Add the known angles together

• 58 + 41 = 99

• Subtract the sum from 180

• 180 - 99 = 81

• Missing angle is 81^o

Multiple Choice

What is the measure of the unlabeled angle of the triangle?

• 90^o

• 82^o

• 98^o

• 75^o

Multiple Choice

Find the measure of the indicated angle.

• 95^o

• 85^o

• 35^o

• 45^o

Multiple Choice

What is the value of the missing angle?

• 61^o

• 50^o

• 60^o

• 69^o

Multiple Choice

What is the measure of angle b

• 146^o

• 34^o

• 36^o

• 136^o

Multiple Choice

What is the measure of the missing angle?

• 140⁰

• 130⁰

• 50^o

• 90^o

Multiple Choice

What is the measure of angle C?

• 155^o

• 115^o

• 75^o

• 65^o