It's a right triangle. So x^2 + y^2 = 12^2. You want to maximize the perimenter = x+y+12. After you have x and y, you can use trig to find the angles
I am having a bit of trouble getting started with this problem:
Any help would be appreciated.The hypotenuse of a right-angled triangle is 12 cm in length. Find the measures of the angles in the triangle that maximize its perimeter.