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Two sides of a rhombus are along the lines, x-y+1=0 and 7x-y-5=0. If its diagnols intersect at (-1,-2), then which one of the following is a vertex of a rhombus? a. `(-3,-9)` b. `(-3,-8)` c. `(1/3,-8/3)` d. `(-10/3,-7/3)`

A

`(-3, -9)`

B

`(-3, -8)`

C

`((1)/(3),-(8)/(3))`

D

`(-(10)/(3),-(7)/(3))`

Text Solution

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The correct Answer is:
C
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