If length of hypotenuse of a right-angled isosceles triangle is ‘x’ and length of perpendicular drawn from right-angle to opposite side is ‘y’, then which is TRUE if a is length of equal sides of triangle?
1
x2 + 2y2 = 5a2
2
2x2 + y2 = 5a2
3
2x2 + 2y2 = 5a2
4
x2 + y2 = 5a2