Question

Rotate shape A 90° clockwise with centre of rotation (0,0).

What are the coordinates of the vertices of the image?

Answer 1

grade

(1,6)====(6,-1)

(3,6)====(6,-3)

(3,5)=====(5,-3)

(2,5)=====(5,-2)

(1,3)======(3,-3)

(2,3)======(3,-2)

Answer 2

(3,-1) (3,-2) (5,-2) (5,-3) (6,-3) (6,-1)

Explanation:

When rotating a shape counter clockwise by 90 degrees about the origin, multiply the x coordinate by -1 and then switch the coordinates. This is just a helpful tip for this special case.