PPT Angles in polygons including sum of exterior and sum of interior

This is an editable PowerPoint explaining the sums of exterior and interior angles. Some parts of it can be used with grade 8, but I would leave the hardest part, proof of exterior angles adding to 360 degrees, to grade 10.

Lesson objectives: Deduce and use the angle sum in any polygon; calculate interior and exterior angles in regular polygons.

The slides have icons to indicate which slides are supposed to be copied by the students. Slides that are not supposed to be copied have an icon of a writing hand and a cross over it. The show requires the teacher to be familiar with the subject and explain, as I've tried to reduce the amount of written text and rely on visuals on this set of slides.

One slide has a GIF animation explaining two parallel lines by starting from one line and sliding into two lines.

At the end, there are 5 check-up questions with answers. 30 slides in total. Visuals suitable for 8.G.A.5, content suitable for HSG-GO.C.10 (doesn't cover all in the standard)