lesson
Deriving the Curved Surface Area of a Cone Using a Sector
Derive the lateral surface area formula of a right cone (π r l) by unrolling its curved surface into a circular sector.

Derive the lateral surface area formula of a right cone (π r l) by unrolling its curved surface into a circular sector.
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9th Grade · Math · Open Global Math
10 lessons
Use Cavalieri's principle and solid decomposition methods to derive and calculate surface areas and volumes of prisms, cylinders, pyramids, cones, spheres, and composite solids.