<span>Using: a^2 + b^2 = c^2 (pythagoras theorem) where 'a' and 'b' are the legs of a right triangle, c is the hypotenuse </span><span>compare the triangle I just drew to the triangle you have for your problem </span><span>you'll see that a = unknown b = 18 c = 36 </span><span>a=18sqrt3 =31.2</span>
