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Triangle MNO has its vertices at the following coordinates:M(2, 2) N(-1,3) O(1,5)Give the coordinates of the image triangle M'N'O' after a 90° counterclockwise rotation about the origin.

User SeriousM
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The counter clockwise rotation of any point X(x,y) about origin results in change of coordinates as,


X(x,y)\rightarrow X^(\prime)(-y,x)

Determine the coordinates of the vertices of the triangle M'N'O'.


M(2,2)\rightarrow M^(\prime)(-2,2)
N(-1,3)\rightarrow(-3,-1)
O(1,5)\rightarrow(-5,1)

So coordinates of triangle M'N'O' are;

M'(-2,2)

N'(-3,-1)

O'(-5,1)

User Sanny Srivastava
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