This is an Isosceles triangle, it has two long sides and a shorter end or base. The appearance is like a Xmas tree lying on its side. One of the long sides is Y, the opposite side or across from Y of the triangle is 10. The short end of the tree shape is missing side X. I need to solve the missing lengths for Y and X. Inside the triangle near the X is 60 degrees and near the top cone part of the triangle is 30 degrees. I hope this helps. Thanks.