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# Warm up! - PowerPoint PPT Presentation

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

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 radius of the circle?)

The back has the same area: the radius of the circle?)

### Spheres the radius of the circle?)

Geometry

Unit 6, Day 6

Ms. Reed

What is a Sphere? the radius of the circle?)

• Definition:

A 3-dimensional circle.

• Examples:

Surface Area the radius of the circle?)

Volume

Formulas

Example #1 the radius of the circle?)

• Calculate the volume of:

15”

V = 4/3 pr3

V = 4/3()(15)3

V 14130in3

Example #2 the radius of the circle?)

• Calculate the volume of:

V = 4/3 pr3

V = 4/3()(3.9)3

V 248.349in3

Example #3 the radius of the circle?)

• Calculate the surface area of:

S = 4pr2

S =4()(6.1)2

S 467.3576 in2

Homework the radius of the circle?)

Work Packet:

Spheres