An equilateral triangle of side 14 centimeters is revolved about an altitude to form a cone. What is the number of cubic centimeters in the volume of the cone? Express your answer to the nearest whole number, without units.

how do we do this?!

please help if you CAN I DONT UNDERSTAND! -
Anonymous,

What is the formula for area of cone?

please help if you CAN I DONT UNDERSTAND! -
Steve,