# Angle Sum Theorem, Exterior Angle Theorem

- Author:
- Duane Habecker, Mr. Mocogni, Philip, mlute

## Can you have more than one obtuse angle in a triangle? Explain.

## Can you have more than one right angle in a triangle? Explain.

Can you have more than one acute angle in a triangle? Explain.

How many degrees are in a triangle?

If one triangle has angles 90, and 45 what is the third angle?

What can you say about the two other angles in a right triangle? (Besides the fact that they must be acute)

If a triangle has angles with degrees 100 and 32, what is the third angle?

## Drag the points around. What do you notice about the remote interior angles and the exterior angle?

Create a triangle. Note their angles and the exterior angle measurement.

Create a triangle with angles 45, 45, 90. What is the exterior angle?

Create a triangle with 35, 55, 90. What is the exterior angle?