Triangle Angle Sum Theorems
- Rebecca Layman
When working with the triangle's interior angles, did the transformations change the measures of the blue or green angles?
Try to move the triangle's angles to create a new triangle. What happens to the angles?
Move the angles of your triangle again. Slide the bar one more time all the way to the right. What do you notice?
What is the angle measure of a line?
From your observations, what is the sum of the measures of the interior angles of any triangle?