Sum of the Exterior Angles of a Triangle
Move point "B" to show that the sum of the exterior angles of a triangle are equal to 360 degrees.
sculpture of Jee Hwan Moon
Start, Perpendicular to line from point not on line
Graphs of Energy V
Exploration 2 - Proportionallity with 3 Lines
Exploration 1 - Proportionallity with Angle Bisector