Warm up!

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Warm up!

• Find the surface area of the backpack to the
  nearest inch

2
The base is 12 in, but what is the height?
(Hint what is the radius of the circle?)
The back has the same area
3
The left side has the same area
4
(No Transcript)
5
The back has the same area
6
(No Transcript)
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(No Transcript)
8
Spheres

• Geometry
• Unit 5, Lesson 9
• Mrs. King

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What is a Sphere?

• Definition
• A 3-dimensional circle.
• Examples

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Formulas

• Surface Area

• Volume

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Example 1

• Calculate the volume of

15
V 4/3 pr3
V 4/3(?)(15)3
V ?14130in3
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Example 2

• Calculate the volume of

V 4/3 pr3
V 4/3(?)(3.9)3
V ?248.349in3
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Example 3

• Calculate the surface area of

S 4pr2
S 4(?)(6.1)2
S ?467.3576 in2