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Glencoe Math: Course 3, Volume 2

GM

Glencoe Math: Course 3, Volume 2 View details

4. Surface Area of Cylinders

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Exercise 1 Page 623

Use the formula for the surface area of a cylinder.

88.0 mm^2

Practice makes perfect

We are given a cylinder and want to find its surface area.

To calculate the surface area of a cylinder, we can use the following formula. S=2π rh+2π r^2 In this formula, r is the radius of the base and h is the height of the cylinder. Substituting r with 2 and h with 5 into the formula, we can solve for S. Let's do it!

S=2π rh+2π r^2

r= 2, h= 5

S=2π( 2)( 5)+2π( 2)^2

▼

Simplify right-hand side

Calculate power

S=2π( 2)(5)+2π(4)

Multiply

S=20π+8π

Add terms

S=28π

Use a calculator

S=87.964594...

Round to 1 decimal place(s)

S≈ 88.0

The surface area of the cylinder is about 88.0 or 88 square millimeters.

Subchapter links

Guided Practice p.622

Independent Practice p.623

H.O.T. Problems p.624

Standardized Test Practice p.624-626

Extra Practice p.625

Common Core Review p.626