G.GCO.9 Acute Angles of a Right Triangle

Interact with the applet below for a minute or two. Then answer the questions that follow. (Feel free to move the triangle's BIG WHITE VERTICES anywhere you'd like.)

1.

What is the sum of the measures of the 2 acute angles of any right triangle?

2.

Given your response to (1) above, what adjective can you use to describe the relationship between these 2 acute angles?

3.

Explain how/why this fact is an immediate result of the theorem you previously saw here (or here.)