Question

What are the new coordinates of these pre-image points after a 270° CCW rotation? A (-3,2), B (4-7), C (-9,-8) A' (-3. 2). B' (4. -7), C (-9.-8)

Answer 1

We have the following:

270° CCW rotation = 90° CW

`90CW(x,y)\rightarrow(y,-x)`

therefore:

`\begin{gathered} A(-3,2)\rightarrow A^(\prime)(2,3) \\ B(4,-7)\rightarrow B^(\prime)(-7,-4) \\ C(-9,-8)\rightarrow C^(\prime)^{}(-8,9) \end{gathered}`

Therefore, the answer is the last option D.