[size=150]Select the ANGLE [icon]https://www.geogebra.org/images/ggb/toolbar/mode_angle.png[/icon] tool to find and display the measures of all 3 angles of this triangle. [br]What do you notice? (Be sure to select the MOVE [icon]/images/ggb/toolbar/mode_move.png[/icon] tool again so you can keep dragging the triangle's vertices around.) [/size][br]