Question

If the area of triangle ABC formed by A(x, y), B(1, 2) and C(2, 1) is 6 square units, then prove that x + y = 15.

Answer 1

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Answer 2

Answer:

Step-by-step explanation:

As per condition ....

6=1/2(x(2-1)+1(1-y)+2(y-2)

:. 12= x+1-y+2y-4

:.12=x+y-3

:.x+y=15