Prove that diagonals of square are equal

1.	Prove that diagonals of square are equal
Answer» Given that ABCD is a square.To prove : AC = BDProof:\xa0(i) In a Δ ABC and Δ BAD,AB = AB ( common line)BC = AD ( opppsite sides of a square)∠ABC = ∠BAD ( = 90° )Δ ABC ≅ Δ BAD ( By SAS property)AC = BD ( by CPCT)

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