Write the formula of area of triangle whose co-ordinates are (a1, b1), (a2, b2), (a3, b3).
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Answer:
A = (1/2) [x1 (y2 – y3 ) + x2 (y3 – y1 ) + x3(y1 – y2)]
ie
A = (1/2) [a1 (b2 – b3 ) + a2 (b3 – b1 ) + a3(b1 – b2)]
Step-by-step explanation:
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½(a1(b2-b3)+a2(b3-b1)+a3(b1-b2))
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