I need help on this plz!

Answer:
c = 6 and d = 9
Step-by-step explanation:
For them to be similar, the ratio of corresponding sides must be equal.
Given a = 10 and b = 15, the ratio is [tex]\frac{10}{15}=\frac{2}{3}[/tex]
Which of the following values of c is to d gives us [tex]\frac{2}{3}[/tex]?
The 2nd option, c = 6 and d = 9 gives us [tex]\frac{2}{3}[/tex]
[tex]\frac{c}{d}=\frac{6}{9}=\frac{2}{3}[/tex]