 Name: ___________________Date:___________________

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### High School Mathematics4.17 Important Points on Cone

 1. A cone is a pyramid with a circular base. 2. Solid cone: It is the figure in space bounded by the curved surface of the cone and its plane circular end. 3. Curved surface area of a cone = pi * r * l, Where r = radius of the base, and l = slant height. 4. Slant height, l2 = h2 + r2. 5. Lateral surface area of a cone is equal to pi * r * l. 6. Total surface area of a cone = Lateral surface area + Area of base, = pi * r* (l+r). 7.Volume of a cone = 1/3 * pi * r2 * h. 8. A circus tent will be generally of the form of hollow cylinder surmounted by a cone. 9. Base of a cone: A cone has a plane surface circular in shape as base. 10. Vertex of cone: It is one end of the cone very far from the base. Name: ___________________Date:___________________