Question

How do I find x and y of this?
x = 90; y = 47
x = 43; y = 47
x = 47; y = 43
x = 90; y = 43
Up above, are the answers.

Answer 1

and this is the picture ^

Answer 2

the little marks on the sides of the triangle mean those sides are equal.
that means you have an isosceles triangle. What do you know about the base angles of an isosceles triangle?