Question

The vertices of triangle are
(1,k), (4,-3) and (-9, 7) and
area Triangle 15q units then
find Kvalue?​

Answer 1

Answer:

$15 = \frac{1}{2} \: 1( - 3 - 7) + 4(7 - k) - 9(k + 3)$

$=> 30 = - 10 + 28 - 4k - 9k - 27$

$=> 39 = - 13k$

$\bf \pink{ k = - 3}$