HELP PLEASE!!! Ashton drew a triangle with vertices A (-1,2), B (5,2) and C (5.-1). He then rotated the triangle 180° counterclockwise about the origin.

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  A'(1, -2), B'(-5, -2), C'(-5, 1)

Step-by-step explanation:

Rotation 180° in either direction is the same as reflection across the origin, or reflection across both the x- and y-axes (in either order). It has the effect of changing the sign of every coordinate value.

  (x, y) ⇒ (-x, -y) . . . . rotation 180°

  A(-1, 2) ⇒ A'(1, -2)

  B(5, 2) ⇒ B'(-5, -2)

  C(5, -1) ⇒ C'(-5, 1)

make sure you have version 2.50

try looking in the very back of the book : )

step-by-step explanation:

you can download it here