If a point O in the interior of a rectangle ABCD is joined with each of vertices A, B, C and D, then OB2 + OD2 will be equal to

If a point O in the interior of a rectangle ABCD is joined with each o

1.	If a point O in the interior of a rectangle ABCD is joined with each of vertices A, B, C and D, then OB2 + OD2 will be equal to
A.	2 OC2 + OA2
B.	OC2 - OA2
C.	OC2 + OA2
D.	OC2 + 2OA2
Answer» D. OC2 + 2OA2

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If a point O in the interior of a rectangle ABCD is joined with each of vertices A, B, C and D, then OB2 + OD2 will be equal to

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