Question

Write the coordinates of the vertices after a rotation of 90 degrees counter clock wise around the origin. Give me the coordinates and that’s it no explanation

Answer 1

$\begin{gathered} C(1,9) \\ D(4,9) \\ E\left(0,3\right) \\ Rotation\text{ of 90\degree counterclockwise} \\ The\text{ new coordinates will be \lparen-y,x\rparen} \\ Hence \\ C^{\prime}(-9,1) \\ D^{\prime}(-9,4) \\ E^{\prime}(-3,0) \end{gathered}$