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Surface Area of Cones and Spheres

Surface Area of Cones and Spheres

Assessment

Presentation

Mathematics

7th - 9th Grade

Practice Problem

Medium

CCSS
8.G.C.9, HSG.GMD.A.3

Standards-aligned

Created by

Taylor Eddings

Used 28+ times

FREE Resource

5 Slides • 4 Questions

1

Surface Area of Cones and Spheres

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2

Surface Area of Cones

  • Find the area of the circle on the bottom of the cone using

     πr2\pi r^2  

  • Find the area of the side of the cone using  πrl\pi rl  where r is the radius and l is the slant height of the cone.  

3

Example 1

Area of the circle.. πr2\pi r^2 so (3.14)(6)(6)



 πrl\pi rl  so (3.14)(6)(10)=


301.44  inches2inches^2 

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4

Multiple Choice

Question image

Find the surface area of the following cone.

1

113.04 cm squared

2

75.36 cm squared

3

128.74 cm squared

5

Multiple Choice

Question image

Find the surface area of the following cone.

1

157.2 yards squared

2

163.2 yards squared

3

252.58 yards squared

4

365.68 yards squared

6

Surface Area of Spheres

  • To find the area of any sphere you just need to know the radius. The formula is: 

     4πr24\pi r^2  

7

Example 1

Formula.. 4πr24\pi r^2 so (4) (3.14)(22)(22)=




6,079.04
 cm2cm^2 

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8

Multiple Choice

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Find the surface area of the following sphere.

1

452.16 mm2

2

108.8 mm2

3

904.32 mm2

4

6658.56 mm2

9

Multiple Choice

Question image

Find the surface area of the following cone.

1

314.16 in2

2

166.67 in2

3

314 in2

4

521.24 in2

Surface Area of Cones and Spheres

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