# Triangle Angle Theorems (V2)

- Author:
- Tim Brzezinski

Interact with the applet below for a few minutes.
Then, answer the questions that follow.
Be sure to change the locations of the triangle's WHITE VERTICES each time

*before*you drag the slider!!!## 1.

What geometric transformations took place in the applet above?

## 2.

When working with the triangle's interior angles, did any of these transformations change the measures of the blue or green angles?

## 3.

From your observations, what is the sum of the measures of the interior angles of *any triangle? *

## 4.

When working with the triangle's exterior angles, did any of these transformations change the measures of the maroon or green angles?

## 5.

From your observations, what is the sum of the measures of the exterior angles of *any triangle? *