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>** Finding Surface Area of a Cylinder** <

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Formula for Cylinder Surface Area is

A cylinder is a 3-dimensional shape that have two circular bases on

the opposite sides. The two circular sides are connected together

by a curve side. Cans are examples of cylinders.

the opposite sides. The two circular sides are connected together

by a curve side. Cans are examples of cylinders.

Cylinder shape

Cylinder shape

pi = 3.14

Example: Find the surface area of the cylinder above.

Formula

Step1: add the numbers in the parentheses

2 x 3.14 x 5 ( 5 + 10)

2 x 3.14 = 6.28

2 x 3.14 x 5 ( 15)

Step2: multiply from left to right

6.28 x 5 = 31.4 x ( 15) = 471 sq cm or 471 cm

2

r = radius

h = height

The raise 2 means square. Area is

measured in square units.

measured in square units.