Question

find the value of K? when the vertices of the triangle are the points are (2,9),(-2,1) ,(k,3). and the are is 28 square unit?
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Answer 1

Answer:

hope it helps you a LITTLE Bit:-))

Answer 2

Step-by-step explanation:

[-2 ,9 ,1]

[ 2 ,1 , 1] = 28

[ k, 3 , 1 ]

28 = 1 /2 [ 2 ( 1 - 3 ) - 9 [ - 2 - k ] + 1 ( -6 - 1 ) ]

56 = -4 + 18 + 9k - 6- k

56 = 8 + 8k

56 - 8 / 8 = k

48 / 8 = k

k = 6

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