This lesson includes 2 additional questions and 63 additional question variations for subscribers.

# Lesson Worksheet: Interior and Exterior Angles of Triangles Mathematics

In this worksheet, we will practice completing geometric proofs using the angle sum of a triangle and finding interior and exterior angles of triangles.

**Q5: **

In a triangle , if , what type of angle is the interior angle at vertex ?

- AReflex
- BObtuse
- CAcute
- DRight

**Q6: **

In the following triangle , if and , find .

**Q7: **

In the given figure, if , , and , find the measure of .

**Q8: **

In the given figure, find the measure of the interior angle .

**Q9: **

In the given figure, find the measure of the exterior angle .

**Q10: **

Find the measure of .