1. Use the ANGLE [icon]/images/ggb/toolbar/mode_angle.png[/icon] tool to measure the 3 interior angles of the triangle shown. [br]2. Also, use this tool to find and display the measure of the one interior angle (lower left). [br][br][color=#0000ff]When you're done (or if your unsure of something), feel free to check by watching the quick silent screencast below the applet. [/color]