How to find area of a triangle in coordinate geometry?
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area of a triangle=(1/2)|x1(y2-y1)+x2(y3-y1)+x3(y1-y2)|
or
area=(1/2)|x1-x2 x2-x3|
|y1-y2 y2-y3|
here, area is 1/2( (a11*a22)+(a12*a21) ) accordingly with above formula
or
area=(1/2)|x1-x2 x2-x3|
|y1-y2 y2-y3|
here, area is 1/2( (a11*a22)+(a12*a21) ) accordingly with above formula
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