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If the vertices of a triangle are (1,2),...

If the vertices of a triangle are `(1,2),(4,k)and(7,8)` and its area is 15 sq. units, then the value(s) of k is

A

`-40,10`

B

`-40,-10`

C

`40,-10`

D

`40,10`

Text Solution

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The correct Answer is:
A
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