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If ABCD is a rhombus, then...

If ABCD is a rhombus, then

A

`AC^2 +BD^2 = 6 AB^2`

B

`AC^2+BD^2=5AB^2`

C

`AC^2+BD^2=4 AB^2`

D

`AC^2 +BD^2 =3AB^2`

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The correct Answer is:
C
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