Equations to Find Triangle Measures

What is the sum of interior angles of a triangle?

• 60 degrees
• 90 degrees
• 180 degrees
• 360 degrees

Find the measure of the indicated angle. 

• 26
• 36
• 85
• 144

Find the measure of the indicated angle. Remember A + B + C = 180. 

• 180
• 70
• 54
• 56

Find the measure of the indicated angle. (Hint: Exterior Angle Sum) 

• 145
• 113
• 102
• 78

Find the measure of the indicated angle. (Use Exterior angle theorem)

• 89
• 211
• 119
• 81

Find the measure of the indicated angle. 

• 35
• 145
• 78
• 67

Find the measure of the indicated angle. 

• 40
• 108
• 72
• 68

Solve for x.

• 7
• 9
• -11
• -6

Solve for x.

• 5
• 12
• -7
• -6

Solve for x.

• 4
• 6
• 7
• -10