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°?
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
