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13.3 Volume of Spheres. Objectives. Find Volumes of Spheres Solve problems involving Volumes of Spheres. Formula for Volume of a Sphere. Where V is Volume, and r is radius, the formula for the volume of a sphere is…………. V = 4/3 π r³. A Sphere. This is a sphere. r. Example 1.

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## 13.3 Volume of Spheres

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**Objectives**• Find Volumes of Spheres • Solve problems involving Volumes of Spheres**Formula for Volume of a Sphere**Where V is Volume, and r is radius, the formula for the volume of a sphere is…………. V = 4/3πr³**A Sphere**This is a sphere. r**Example 1**Find the Volume of this sphere. V = 4/3r³ 24 in. Answer: V ≈ 57,905.8 in³**Example 2**Find the Volume of this sphere. C = 36cm Answer: V ≈ 787.9 cm3**Example 3**Find the Volume. 18 cm Answer: V ≈ 3035.6 cm3**Hemispheres and Their Volumes**http://mathworld.wolfram.com/Hemisphere.html The way to calculate the volume of this hemisphere is by using this formula. V = ½(4/3r3) or 2/3r³**Example 4**http://mathworld.wolfram.com/Hemisphere.html If your diameter is 4 ft, find the volume of this Hemisphere. V ≈ 16.8 ft³**Assignment**Pages 704-706 #9-22, 30 & 31, 32-Extra Credit**Assignment**Pages 704-706 #9-22, 30 & 31 32-Extra Credit

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