Warm up! Find the surface area of the backpack to the nearest inch:

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Presentation transcript:

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 Mr. Zampetti

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Formulas Surface Area Volume

Example #1 Calculate the volume of: 15” V = 4/3 r 3 V = 4/3(15) 3 V 14130in 3

Example #2 Calculate the volume of: V = 4/3 r 3 V = 4/3(3.9) 3 V  in 3

Example #3 Calculate the surface area of: S = 4r 2 S =4(6.1) 2 S  in 2

Homework Work Packet: Spheres