meredith48034 meredith48034

07-08-2019
Mathematics

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find the coordinates of the vertices of a triangle after a 90 degree rotation counterclockwise about the origin.

find the coordinates of the vertices of a triangle after a 90 degree rotation counterclockwise about the origin class=

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mathmate mathmate

07-08-2019

Step-by-step explanation:

The rule for a 90 degree counterclockwise is

(x,y) -> (-y,x)

so

C(-1,2) -> C'(-2,-1)

D(3,5) -> D'(-5,3)

E(1,2) -> E'(-2,1)

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