Question

Write at least one formula or theorem that may be used in a coordinate proof.

The diagonal of a parallelogram forms two congruent triangles. ???

Answer 1

the diagonal part is true if that's what your looking for...
as far as the other part, are you wanting different types of properties that you can use in a proof?

Answer 2

no i am supposed to come up with a therom that proves that statement

Answer 3

oh im sorry then I cant help you there

Answer 4

:(