(a) According to the given image, the figures are similar by angle-angle-angle-angle.
(b) To find the scale factor, we just have to divide two corresponding sides.
![(LM)/(GH)=(6)/(4)=(3)/(2)=1.5](https://img.qammunity.org/2023/formulas/mathematics/college/evyevvo0jxtkr0kcdqho12ufsakekq6ncl.png)
The scale factor is 1.5.
(c) To find x and y, we just have to use the scale factor.
![\begin{gathered} x=8\cdot1.5=12 \\ y=(9)/(1.5)=6 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/ybxfd8pjmxy57hfayfsep3jtpbxg8dgqft.png)
Observe, that we multiplied to find x because it's a side of the bigger figure. On the other hand, we divided to find y because it's a side of the smaller figure.
Hence, x = 12 and y = 6.