The truncated cone volume formula: v = [s+s'+√ (ss')] h ÷ 3 = π h (R2+RR+R2)/3. Cut the cone with a plane parallel to the bottom of the cone, and the part between the bottom and the cross section is called truncated cone. Volume formula of extended data truncated cone

In the formula, r is the upper bottom radius, r is the lower bottom radius, and h is the height.

The formula of frustum surface area is: s = π R2+π R2+π RL+π RL = π (R2+R2+RL+RL).

R- upper bottom radius, R- lower bottom radius, h- height, L-bus = under the root sign [(R-r)2+h2]

Properties of frustum of a cone

1, and the section parallel to the bottom is a circle.

2. The cross section of the shaft is isosceles trapezoid.

Like other pyramids, what if it is a cone? The radius of the upper bottom should be 1/2 of the lower bottom, and the cross-sectional area should be 1/7 of the whole cone area. There is only one bus on one side of the frustum.

4. If you rotate around the waist perpendicular to the bottom of the right trapezoid, you will get a frustum.

5. Any two buses behind the frustum of a cone extend to one point.