Creation of this resource was inspired by a [url=http://gogeometry.com/school-college/p851-triangle-triple-side-angle-90-degrees.htm]problem[/url] posted by [url=https://twitter.com/gogeometry]Antonio Gutierrez[/url]. [br][br]You can move the LARGE WHITE POINTS anywhere you'd like at any time. [br][br][b]Key Questions:[/b] [br][br]1) What is the [b][color=#ff00ff]EXACT MEASURE of the PINK ANGLE[/color][/b]? [br][br]2) Suppose we didn't see the [b][color=#38761d]green triangle[/color][/b] appear. How can we prove that this [b][color=#ff00ff]pink angle[/color][/b] has this given [br] measure?