The sides of a triangle are 7,24 and 25 cm. Find its area (in `cm^2`)

The sides of a triangle are 5cm,12cm and 13cm. Then its area is :

The sides of a triangle are 15 cm, 20 cm and 25 cm. Find the perpenducular distance of its greatest sides from its oppsite vertex.

The side of an equilateral triangle is 8cm. Find its area (in cm^(2) ).

The side of an equilateral triangle is 10 cm. Find its area (in cm^(2) ).

Sides of a triangle are 45 cm, 39 cm and 42 cm, find its area.

The sides of a right triangle are 7cm,24cm and 25cm. If it is revolved about its side 7cm to form a solid cone find the volume of the solid so formed.