Question

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.

Answer 1

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Answer:

A'(1, -2), B'(-5, -2), C'(-5, 1)

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)