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Mathematical surface area of sixth grade in primary school
Rectangular surface area: s=2 times (length times width+length times height+width times height)

Square surface area: s=6 times (side by side)

Cylinder surface area: s= cylinder bottom area X2+ cylinder side area.

The formula π r 2 in which the bottom area is the circular area.

Transverse area = bottom circumference x height = 2π r h.

Surface area of cone: s= side area of cone+area of bottom circle.

Transverse area of cone =πRL

Total area of cone =πRl+πR2

π is pi 3. 14.

R is the radius of the circle at the bottom of the cone.

L is the generatrix length of the cone.