Exterior and Triangle Sum Theorem

Find the measure of the angle indicated. 

• 139°
• 66°
• 138°
• 116°

The Triangle Sum Theorem states that the sum of all angles in a triangle is ______. 

• 45°
• 90°
• 180°
• 360°

What is the third angle of a triangle whose 1st angle is 79 and the 2nd angle is 43?

• 43
• 58
• 72
• 101

Find the measure of the missing angle.

• 90^o
• 10⁰
• 130^o
• 50^o

Angles that are exactly 90 degrees are called _____ ______.

• tight angles
• acute angles
• obtuse angles
• right angles

If 2 of the angles of a triangle are 30 and 70 degrees, the third angle measures...

• 80
• 100
• 60
• 90

Find the measure of the indicated angle. 

• 26
• 36
• 85
• 144

A student is trying to construct triangles using four different sets of angles. The angles in each set are given below. Which set will form a triangle?

• 45°, 65°, 70°

• 150°, 110°, 100°

• 50°, 50°, 50°

• 90°, 90°, 90°

Which of the following terms best describes Angle d?

• Remote interior angle
• Corresponding angle
• Exterior angle
• Interior angle

Find the indicated angle. (What is ?)

• 91°

• 81°

• 89°

• 109°