Drawing Challenges - Geometry Proof

I've used these for introduction to proof, angles and any geometry subject really.

Encourage the student to give an absolute reason why they might not be able to complete any of the challenges.

I usually ask students to prove or draw on the whiteboard as we are going along. Students can use peer work as they work themselves. Sometimes I might send someone who is wrong up to the front to draw their solution - this normally generates great debate and questions many students working.