The number of diagonals of an Octagon is:

The diagonals of a rhombus are 8 cm and 10 cm, then the area of the rhombus is

The perimeter of a rhombus is 100 cm and one of the diagonals is 40 cm. Then the area of the rhombus is

The ratio of the area of a square to that of the square drawn on its diagonal is

The lengths of the diagonals of a rhombus are 10 cm and 24 cm. Its perimeter is

The perimeter of a rhombus is 100 cm and one of its diagonal is 40 cm. Then its area in sq. cm is: