Interior Angles of a Triangle

What is the sum of interior angles of a triangle?

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

Find the measure of each angle indicated. 

• 139°
• 66°
• 138°
• 116°

Find the measure of the missing angle.

• 8^o
• 58^o
• 122^o
• 64^o

What is the missing angle?

• 10
• 50
• 55
• 90

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

• 80

• 100

• 60

• 90

Which of the following could be angle measures for a triangle?

A 120°, 50°, 20°

B 100°, 200°, 60°

C 30°, 50°, 80°

D 40°, 50°, 90°

• A

• B

• C

• D

Find x

• 40 degrees

• 21 degrees

• 42 degrees

• 39 degrees

Which Angle measurements create a Triangle?

• 60,60,61

• 90,45,45

• 100,50,50

• 90,90,80

Which Angle measurements does NOT create a Triangle?

• 60,60,60

• 90,45,45

• 50,60,40

• 50,100,30

Can the sides of a triangle have lengths 3, 4, and 9?

• Yes
• No