Use the ANGLE [icon]/images/ggb/toolbar/mode_angle.png[/icon] tool to measure the angles of this triangle now. To do this the easy way, select the ANGLE tool [icon]/images/ggb/toolbar/mode_angle.png[/icon], click inside the triangle, and then select the MOVE tool [icon]/images/ggb/toolbar/mode_move.png[/icon] again (to turn the angle tool off). [br][br]Move the vertices (corners) of the triangle around again. Notice anything interesting?