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Warm up!. Find the surface area of the backpack to the nearest inch:. The base is 12 in, but what is the height? (Hint: what is the radius of the circle?). The back has the same area:. The left side has the same area:. The back has the same area:. Spheres. Geometry Unit 6, Day 6 Ms. Reed.

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Presentation Transcript
warm up
Warm up!

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

slide2

The base is 12 in, but what is the height? (Hint: what is the radius of the circle?)

The back has the same area:

spheres

Spheres

Geometry

Unit 6, Day 6

Ms. Reed

what is a sphere
What is a Sphere?
  • Definition:

A 3-dimensional circle.

  • Examples:
example 1
Example #1
  • Calculate the volume of:

15”

V = 4/3 pr3

V = 4/3()(15)3

V 14130in3

example 2
Example #2
  • Calculate the volume of:

V = 4/3 pr3

V = 4/3()(3.9)3

V 248.349in3

example 3
Example #3
  • Calculate the surface area of:

S = 4pr2

S =4()(6.1)2

S 467.3576 in2

homework
Homework

Work Packet:

Spheres

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