In the applet below, the pink angle and the blue angle are said to be complementary angles.
Interact with this applet for a minute or two, and answer the questions that appear below it.

1. In your own words, say what it means for two angles to be complementary.

2. In the applet above, the blue angle is said to be a complement of the pink angle, and vice versa.
Given this information, determine the complement of a 40 degree angle.