well using the angle rule (all interior angles of a triangle equal 180) we can determine that angle A is 30 degrees. u know that this is a special triangle, bc 30-60-90 triangles have special rules. to find the hypotenuse, you’re going to find CB first. it’s simply 6, due to the rules. to find AB from this 6, you double it. x=12! :) (i hope so lol i haven’t done geometry in a while)