Answer:
![(y)/(2)=(x)/(1)](https://img.qammunity.org/2021/formulas/mathematics/middle-school/sp4pfg1tixoxiwpttvhmff1f7frf1qp8oq.png)
Explanation:
we know that
If two figures are similar, then the ratio of its corresponding sides is proportional and its corresponding angles are congruent
The corresponding vertical sides are y and 2
The corresponding horizontal lines are x and 1
so
The proportion is equal to
![(y)/(2)=(x)/(1)](https://img.qammunity.org/2021/formulas/mathematics/middle-school/sp4pfg1tixoxiwpttvhmff1f7frf1qp8oq.png)