The image you've uploaded contains mathematical problems involving right-angled triangles. The task is to find the unknown lengths, denoted as $x$ and $y$, in each case. These problems likely require the application of the Pythagorean theorem or properties of similar triangles.

Let's break down each part:

a)

The triangle's sides are $25$, $15$, and $x$, with the unknown $y$. This looks like a right triangle, and we could use the Pythagorean theorem to solve for $x$ and $y$.

b)

This triangle has sides $24$, $10$, and $x$, with $y$ as the unknown side. Similarly, the Pythagorean theorem or proportionality principles may be useful here.

c)

We have a triangle with sides $8$, $x$, and $x/\sqrt{3}$, where you can use the properties of right triangles to solve for the unknowns.

d)

This triangle involves a more complex expression involving $18 + 14/2$ for the side lengths, which could be simplified and approached similarly.

Do you want me to solve all of them step by step or focus on a specific one?