- #1
thomas49th
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Homework Statement
ABCD is a square and on side BC an equalaterial triangle is made extending to vertex E and another is made on line DC extending to vertex F. Prove that ECD is congruent to BCF.
Homework Equations
Proof is all about using algerbra to prove somthing right?
If it's congruent it has to fit into 4 congruent rules:
SSS
ASA
SAS
RHS
The Attempt at a Solution
Well DC = BC
but where now. I can descirbe it in words, but I believe u need to use albebra to prove it :(