Surface Area of a Cylinder

h

A cylinder is a prism with a circular cross-section.

2r

Surface Area of a Cylinder

A cylinder is a prism with a circular cross-section.

r2

r2

Removing top and bottom

Open out 2r

hSurface Area = 2r2 +

2rh

6 cm

Calculate the surface area of the following cylinders.

15 cm

2.1mm

9.2 mm

3 cm 2 cm

1

2

3

SA = 2 x x 32 + 2 x x 3 x 6

= 169.6 cm2

SA = 2 x x 22 + 2 x x 2 x 15

= 213.6 m2

SA = 2 x x 4.62 + 2 x x 4.6 x 2.1

= 193.6 mm2

Surface area = 2r2+2rh