Apply logical reasoning, including the use of congruence and similarity, to proofs and numerical exercises involving plane shapes
Elaborations
distinguishing between a practical demonstration and a proof (for example demonstrating triangles are congruent by placing them on top of each other, as compared to using congruence tests to establish that triangles are congruent)
performing a sequence of steps to determine an unknown angle giving a justification in moving from one step to the next.
communicating a proof using a sequence of logically connected statements
