U2 D4 Exterior Angles Theorem

Select the checkboxes for "Exterior Angle A", "Angle B" and "Angle C". Add the measurements of interior angles B and C. How does this sum compare to exterior angle A?

Uncheck your previous selections. Select the checkboxes for "Exterior Angle B", "Angle A" and "Angle C" only. Add the measurements of interior angles A and C. How does this sum compare to exterior angle B?

If interior angle A = 60 degrees and interior angle B = 70 degrees, what is the measure of exterior angle C? Hint: You can click and drag the points A and B in the applet to help you figure this one out!

Select the checkboxes for all of the exterior angles. Add together the measurements of all the exterior angles. What is the sum of the exterior angles?

Which of the following can be concluded about the exterior angles of triangles. Select all that apply.