Triangles & Angles

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

• 45°
• 90°
• 180°
• 360°

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 measure. (What is ?)

• 51°

• 37°

• 167°

• 41°

What is the measure of x?

• 101°

• 111°

• 121°

• 131°

Find the measure of the missing angle.

• 90^o
• 10⁰
• 130^o
• 50^o

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

• 43
• 58
• 72
• 101

What is the value of x?

Which statements are always true regarding the diagram? Check all that apply.

The measure of angle ABC is

• 50

• 60

• 70

• 120