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PQRS is a rhombus than what would be PQ^...

PQRS is a rhombus than what would be `PQ^2 + QR^2 + RS^2 + SP^2=?`

A

`2(PR^2+QS^2)`

B

`(PR^2+QS^2)`

C

2PQ.RS

D

`4(PR^2+QS^2)`

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