Finding coordinates of incentre if coordinates of triangle are given
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Given the coordinates of the three vertices of a triangle ABC,
the coordinates of the incenter O are
O x =
a A x + b B x + c C x
p
O y =
a A y + b B y + c C y
p
where:
Ax and Ay are the x and y coordinates of the point A etc..
a, b and c are the side lengths opposite vertex A, B and C
p is perimeter of the triangle (a+b+c)
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