What is the mathematical formula of the first volume of the seventh grade?

The mathematical formula of the first volume of the seventh grade is as follows:

I. side area of right-angle prism S=c*h

Second, the regular pyramid lateral area s =1/2c * h.

Third, the prism side area s =1/2 (c+c) h.

Fourthly, the side area of frustum of a cone is s =1/2 (c+c) l = pi (r+r) l.

Five, the surface area of the ball S=4pi*r2.

Six, the cylindrical side area s = c * h = 2pi * h.

Seven, cone lateral area s =1/2 * c * l = pi * r * l.

Eight, the arc length formula l=a*ra is the radian number r > of the central angle; 0

Nine. Sector area formula s =1/2 * l * r.

X. Cone volume formula V= 1/3*S*H

XI。 Cone volume formula V= 1/3*pi*r2h