Shape, space and measures proofs  Free maths worksheets
It is always a tricky subject trying to get pupils to understand the proofs behind familiar rules of geometry, so I like to make sheets that lead them through the steps and get them thinking about it as they go.
180 degrees in a triangle proof worksheetTwo worksheets to lead pupils through the proofs of 180 degrees in a triangle and the exterior angle rule.

Angles subtended by an arc proof worksheetA worksheet to lead pupils through a proof that the angle subtended by an arc of a circle at the centre is twice the angle at the circumference.

Alternate segment theorem proof worksheetA worksheet to lead pupils through a proof of the alternate segment theorem.
