The area of the triangle formed by joining the points (2,7) (5,1) and (x,3) is 18 sq units. Find x please let me know the answer fast
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Triangle formula = 1/2 [x1(y2-y3)+x2(y3-y1) +x3(y1-y2)] .
18=1/2×[2(1-3)+5(3-7)+x(7-1)]
18×2=[2(-2)+5(-4)+6x
36= -4-20+6x
36+24=6x
60/6=x
x=10.
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Hopes it help u mark it as a brainlist answer.
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