IXL Exterior angles of triangles

Extending one side of a triangle creates an exterior angle. Learn more about exterior angles and their properties in this free interactive lesson!

IXL Geometry G3: Exterior Angles of Polygons

IXL - Exterior Angle Theorem (Geometry practice)

IXL, Triangle Angle-Sum Theorem

IXL, Exterior angles: find unknown values

IXL Proofs with similar triangles

IXL Similar triangles

IXL, Find missing angles in triangles

Finding Missing Interior and Exterior Angles of Triangles #2, Worksheet

IXL Interior angles of triangles

IXL, Proofs involving triangles I

IXL, Exterior angles: find angle measures