Properties of a Rhombus

A rhombus showing the relationship between the vertically opposite angles, the length of the diagonals and the angle they intersect.
a) Can you make the diagonals of the rhombus equal? If so what shape does the rhombus become? b) Explain the relationship between the angles of the Rhombus c) The diagonals of a rhombus bisect each other at right angles. Hence how could you use two straight sticks on sand to pinpoint the four vertices of a rhombus?