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All about Spheres

1,184 views · Published 14 June 2014 · 21:44 · Indexed 4 November 2026

Channel: MooMooMath and Science · 2014 · Education

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Learn all about spheres. This goes along with the state standard, 
Common Core Standard G.GMD.3
This is a long video so use the video guide to jump to the problems you want help with.
Video Guide

0:08 Definition of a sphere 

1:16 Radius of a sphere explained.

2:56 Definition of the "Great Circle"

3:27  Definition of hemisphere and a brief explanation of hemisphere

4:55  Surface area of a sphere formula

5:00 Volume of a sphere formula

5:32  Directions for finding the surface area of a sphere.

6:54 Sample Problem: . Find the surface area of a sphere with a radius of 9 in. Give both the exact answer and the rounded decimal answer.

7:52 Solution: Find the volume of a sphere with a diameter of 10cm.

10:21 Solution:  Find the radius of a sphere with  .volume of 72 meters cubed
 
13:00 The circumference of a great circle is 25 inches. Find the surface area and volume of the sphere.

17:57 Solution: A spherical balloon has a surface area of 16 in2. Find the volume of the sphere.

20:23 A spherical balloon has an initial radius of 5 in. When more air is added, the radius becomes 10 in. Explain how the surface area and volume change as the radius changes.

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