Find the area of a triangle formed by the points A(5, 2), B(4, 7) and C(7, −4).
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take A(x1,y1) , B(x2,y2) , C(x3,y3)
then,put on formula that is:-
1/2{x1(y2-y1)+x2(y3-y1)+x3(y1-y2)}
then you get your answer of question
then,put on formula that is:-
1/2{x1(y2-y1)+x2(y3-y1)+x3(y1-y2)}
then you get your answer of question
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