Question

area of triangle formed by A(5, 2),B(7,9) and C(9, 16)​

Answer 1

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Answer 2

Answer:

1/2{5(9-16) +7(16-2) +9(2-9) }

1/2{(5×-7) +(7×14) +(9×-7) }

1/2{-35+98-63}

1/2(-98+98)

1/2(0)

0