Triangle Exterior Angle Sum Theorem

1.
Use the slider to rotate the triangle and point H to translate the triangle.
2.
Rotate and translate the triangle so that all points are located at C.
3.
Make a conjecture about the exterior angle of the triangle.
4.
Is your conjecture always true? How do you know?
Close
– M. Kugler, GeoGebra Materials Team

Information: Triangle Exterior Angle Sum Theorem