How to Make a Cone Out of Cardboard
Open a recycled cereal box, gently pulling at the seams until you have a flat piece of cardboard.Draw a large isosceles triangle onto the plain side of the cardboard with a pencil. Cut out the triangle along the pencil guidelines.
What is the formula for a truncated cone?
Truncated cone volume (volume of frustum)
volume = (1/3) * π * depth * (r² + r * R + R²) , where R is a radius of the base of a cone, and r of top surface radius.
