Question

Help!

5) Rotate 90 counterclockwise about the origin.

7) Rotate 90 counterclockwise about the origin.
(Im not sure if I’m doing this right)

Answer 1

Explanation:

the other answer is right. and the reason is as described in my answer to the other question with a rotation of 90° counterclockwise.

x and y trade places and the new x (old y) flips the sign.

Answer 2

5. A' (5,-3) B'(5,-12) C'(0,-7)

6. A'(3,9) B'(3,4) C'(-3,4) D'(-3,9)

Explanation:

The Rule for 90 degrees counterclockwise is (x,y) becomes (-y,x)