Similar Right Triangles (II)

Interact with the applet below for a few minutes, then answer the questions that follow.  
[b]Questions:[/b]  [br][br]1) What is the sum of the measures of the [color=#ff0000]red[/color] and [color=#6aa84f]green[/color] angles?  [br]    How do you know this to be true?  [br] [br]2) The segment that was drawn as you dragged the slider is called an [b]altitude.[br][/b]    This [b]altitude [/b]was [b]drawn to the hypotenuse[/b].  [b]  [br][/b]    How many right triangles did this [b]altitude[/b] split the original right triangle into?[br][br]3) What does the the special movement of the red and green angles imply about[br]    these 2 smaller right triangle?  What previously learned postulate or theorem justifies[br]    your answer?  [br][br]4) Does your response for (3) also hold true for the relationship between the ORIGINAL[br]    BIG RIGHT TRIANGLE and either one of the smaller right triangles? If so, how/why[br]    do you know this?  

Information: Similar Right Triangles (II)