The area of a regular hexagon of side ‘a’ is the sum of the areas of the five equilateral triangles with side a.

If the side of a rhombus is 10 cm and one diagonal is 16 cm, the area of the rhombus is 96 cm²

The base and the corresponding altitude of a parallelogram are 10 cm and 3.5 cm, respectively. The area of the parallelogram is 30 cm2.

The cost of leveling the ground in the form of a triangle having the sides 51m, 37m and 20m at the rate of Rs 3 per m2 is Rs 918.

In a triangle, the sides are given as 11 cm, 12 cm and 13 cm. The length of the altitude is 10.25 cm corresponding to the side having length 12 cm.