Unwrap the surface of a sphere. A section of an extensive geometry playlist introduces the formulas for finding the surface area and volume of a sphere. The video includes a clip of how the surface area formula is developed by unwrapping a sphere.

Concepts

spheres, volume of spheres, surface area

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Additional Tags

math

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Instructional Ideas

• Demonstrate the formula of the surface area of a sphere by peeling an orange
• Have individuals come up with methods to remember the formulas for surface area and volume

Classroom Considerations

• Assumes individuals know the relationship between the circumference and radius of a circle

• This video is hosted on YouTube

Pros

• Links to more sphere resources
• Shows the mathematical work within the examples

Cons

• None

Common Core

HSG-GMD.A.2 HSG-GMD.A.3 MP2 MP6