This is a free preview. For full access
Geometry: Angles in Polygons
Exterior Angle Theorem
Description
Exterior Angle Theorem
Introduction
Triangles are everywhere—from roof designs to road signs and bridges. The Exterior Angle Theorem helps us find missing angles in triangles without measuring them. It also helps us understand how angles inside and outside a triangle are c...
Show More
Transcript
Nova is working on her math project when she draws triangle ABC to find the relationship between an exterior angle of a triangle and its interior angles.
She extends side BC beyond point C and notices that this forms an exterior angle. An exterior angle is formed outside the triangle when one side is extended.
She ...
Show More