prove that the points (A,B+C), (B,C+A) and (C,A+B) are collinear
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If they r collinear area under the triangle formed by them=0
Formula is 1/2[x1(y2-y3)+X2(y3-y1)+x3(y2-y3)]
Here x1=a y1=b+c
X2=b. Y2=c+a
X3=c. Y3= b+a
Formula is 1/2[x1(y2-y3)+X2(y3-y1)+x3(y2-y3)]
Here x1=a y1=b+c
X2=b. Y2=c+a
X3=c. Y3= b+a
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