Triangle Side and Angle Relationships Discovery

Discover the relationship between the sides and angles in one triangle:Use the arrow (move) tool to drag the vertices around the page.
Interact with this app for a few minutes. LARGE POINTS are moveable.
Triangle Exterior Angle
What is the relationship between the interior angles of a triangle?
Triangle Interior Angle
– GeoGebra Team German, Tim Brzezinski, Erica Chang, Julie Morisano

Information: Triangle Side and Angle Relationships Discovery