Triangle Theorems Lessons

Triangle Sum Theorem

​What does this demonstration suggest?

Multiple Choice

Find the measure of the indicated angle.

• $$135\degree$$  

• $$55\degree$$  

• $$45\degree$$  

• $$60\degree$$  

Multiple Choice

Find the measure of the indicated angle.

• $$45\degree$$  

• $$33\degree$$  

• $$123\degree$$  

• $$147\degree$$  

Multiple Choice

Find the measure of angle C. 

• 34
• 46
• 62
• 36

Exterior Angle Theorem

​What does this demonstration suggest?

Multiple Choice

What is the value of the missing angle?

• 105

• 80

• 55

• 25

Multiple Choice

Find the measure of the missing angles.

• A

• B

• C

• D

Multiple Choice

Find the value of x.

• A
• B
• C
• D