Question

The figure formed by joining the mid points of the sides of a quadrilateral ABCD, in order,is a square only if:
1.ABCD is a rhombus
2.Diagonals of ABCD are equal
3.Diagonals of ABCD are equal and perpendicular
4.Diagonals of ABCD are perpendicular

Answer 1

3.Diagonals of ABCD are equal and perpendicular

Answer 2

diagonals of ABCD are equal