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.)
What is the sum of the measures of the 2 acute angles of any right triangle?
Given your response to (1) above, what adjective can you use to describe the relationship between these 2 acute angles?