Five-Minute Check (over Lesson 12–4)

Main Idea

Key Concept: Surface Area of a Cylinder

Example 1:Find the Surface Area of a Cylinder

Example 2:Real-World Example

• Find the surface area of a cylinder.

Find the Surface Area of a Cylinder

Find the surface area of the cylinder. Round to the nearest tenth.

Answer: 169.6 cm2

S = 2r 2 + 2rh

= 2(3)2 + 2(3)(6) Replace r with 3 and h with 6.

1. A

2. B

3. C

4. D

A B C D

0% 0%0%0%

A. 987.3 in2

B. 1,156.1 in2

C. 1,347.8 in2

D. 1,621.5 in2

Find the surface area of the cylinder. Round to the nearest tenth.

GIFT WRAP A poster is contained in a cardboard cylinder that is 10 inches high. The cylinder’s base has a diameter of 8 inches. How much paper is needed to wrap the cardboard cylinder if the ends are to be left uncovered?Since only the curved side of the cylinder is to be covered, you do not need to include the areas of the top and bottom of the cylinder.

S = 2rh

Replace r with 4 and h with 10.= 2(4)(10)

≈ 251.2Simplify.

Answer: About 251.2 square inches of paper is needed.

1. A

2. B

3. C

4. D

A B C D

0% 0%0%0%

A. 226.2 in2

B. 241.5 in2

C. 263.9 in2

D. 275.5 in2

LABELS A can of fruit juice is in the shape of a cylinder with a diameter of 6 inches and a height of 12 inches. How much paper is needed to create the label if the ends are to be left uncovered?

End of the Lesson

Five-Minute Check (over Lesson 12–4)

Image Bank

Math Tools

The Pythagorean Theorem

1. A

2. B

3. C

4. D

A B C D

0% 0%0%0%

(over Lesson 12-4)

A. 164 in2

B. 231 in2

C. 262 in2

D. 350 in2

Find the surface area of the rectangular prism. Round to the nearest tenth if necessary.

1. A

2. B

3. C

4. D

0% 0%0%0%

(over Lesson 12-4)

A. 47.3 yd2

B. 69.3 yd2

C. 105.5 yd2

D. 116.5 yd2

Find the surface area of the rectangular prism. Round to the nearest tenth if necessary.

1. A

2. B

3. C

4. D

A B C D

0% 0%0%0%

(over Lesson 12-4)

A. 384 cm2

B. 320 cm2

C. 272 cm2

D. 160 cm2

Find the surface area of a rectangular prism that has a length of 8 centimeters, a width of 6 centimeters, and a height of 8 centimeters.

1. A

2. B

3. C

4. D

A B C D

0% 0%0%0%

(over Lesson 12-4)

A. 147 cm2

B. 196 cm2

C. 294 cm2

D. 343 cm2

If the area of one face of a cube is 49 cm2, what is the surface area of the cube?