Triangle mrn is created when an equilateral triangle is folded in half. triangle n r m is shown. angle n r m is a right angle. an altitude is drawn from point r to point s on side m n to form a right angle. the length of n s is 6, the length of s m is 2, the length of r m is x, the length of n r is y, and the length of r s is z. what is the value of x? 2 startroot 3 endroot units 4 units 4 startroot 3 endroot units 8 units