# Identify the rotation rule on a coordinate plane that verifies that triangle A(2,-1), B(4,1), C(3,3) and triangle A'(-2, 1), B'(-4,-1), C'(-3,-3) are congruent when rotated 180°?

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A) (x, y) → (-y, x)

B) (x, y) → (-x, -y)

C) (x, y) → (y, -x)

D) the triangles are not congruent

A) (x, y) → (-y, x)

B) (x, y) → (-x, -y)

C) (x, y) → (y, -x)

D) the triangles are not congruent

##### 1 Answer

Feb 22, 2018

is

#### Explanation:

By using the rule for a 180 degrees rotation, we can get the coordinates for the image: (x, y) becomes (-x, -y)

Hence the answer is