Proof 3D Congruent Triangles

Описание: We show how to do a proof with 3D geometry, using the Line/plan/foot theorem.

The problems in this playlist show how to think about 3D geometry, which simply involves more steps than plane geometry. Perpendicularity is prominent in them.

This problem is meant to supplement problems in the book, Geometry for Enjoyment and Challenge. It is here to help students see how to do Geometry problems by example.

The entire problem is shown up front, so students can see if it is what they need. If the beginning is all you need, please consider letting the entire video run in the background.