Because this triangle is an Isosceles triangle, two of the angles will be the same. You can tell this is an Isosceles triangle because two sides have the same length but the other does not. You can use this to make an equation. Because a triangle has 180 degrees all together, you can use the equation 2x+56=180. To solve for X you first do 180-56. You will get 124. Now you have 2x=124. You then divide 124 by 2. You will then get 62. This means X = 62 or 62 degrees. The final answer will be X = 62 Degrees.