1.

The four vertices of a quadrilateral are (1,2), (-5,6), (7, -4) and (k, -2) taken in order. If the area of the quadrilateral is zero, find the value of k

Answer» K=11

Because if area of the quadrilateral is zero then all the points lie on the same line .

Step1. Find equation of line with the help of given points .

Step1. Put point (k,-2)

Step3. Solve it for k.


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