Exercise 2 Page 597

The transformation $\left(D_{\frac{1}{4}}\circ r_{\left(180^{\circ },O\right)}\right)\left(△RST\right)$ can be written as $D_{\frac{1}{4}}\left(r_{\left(180^{\circ },O\right)}\left(△RST\right)\right).$ This means that we will rotate $△RST$ $180^{\circ }$ about the origin $O$ and then dilate the image by a scale factor of $\frac{1}{4}.$

We will do these two things one at a time.