Question

polygon kwsd is copied on a piece of patty paper and is rotated about point t. what rotation will result in polygon kwsd laying on top of polygon kwsd?

Explanation:

Step1: Identify initial and final positions

Initial polygon is $KWSD$ and final is $K'W'S'D'$. Point $K$ is at $180^{\circ}$ and $K'$ is at $90^{\circ}$.

Step2: Calculate rotation angle

Since we are rotating counter - clockwise, we find the difference in angles. The rotation is from $180^{\circ}$ to $90^{\circ}$, so the rotation angle is $180 - 90=90^{\circ}$ counter - clockwise.

Answer:

$90^{\circ}$ counter - clockwise