Occasionally, I will provide students with optional, more challenging, problems to work on with their regular assignments. I will post the problems along with solutions here.

Item 1 is listed as the world's hardest "easy" geometry problem. Here is a link. Good luck!

Hardest Easy Geometry Problem - Determine an angle measure using only basic geometry knowledge

PDF Perp Lines & Slopes   --   Proof that slopes of perpendicular lines are negative reciprocals