Geometry Class: Cone and Sphere Surface Area
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Questions and Answers

A cone has a radius of 5 cm and a slant height of 13 cm. What is the lateral surface area of the cone?

  • 169π cm²
  • 130π cm² (correct)
  • 65π cm²
  • 325π cm²
  • A sphere has a radius of 6 cm. What is the surface area of the sphere?

  • 144π cm² (correct)
  • 108π cm²
  • 36π cm²
  • 288π cm²
  • A cone has a radius of 4 cm and a height of 3 cm. What is the volume of the cone?

  • 48π cm³
  • 12π cm³
  • 64π cm³
  • 16π cm³ (correct)
  • A sphere has a volume of (32/3)π cm³. What is the radius of the sphere?

    <p>2 cm (D)</p> Signup and view all the answers

    A cone has a radius of 7 cm and a slant height of 25 cm. What is the total surface area of the cone?

    <p>245π cm² (A)</p> Signup and view all the answers

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    Sphere is inscribed in a cube find the ratio of the volume of cube to the volume of sphere

    <p>6:π</p> Signup and view all the answers

    Flashcards

    Lateral Surface Area of a Cone

    The area of the curved surface of a right circular cone, excluding the base.

    Total Surface Area of a Cone

    The combined area of the lateral surface and the base of a right circular cone.

    Volume of a Cone

    The amount of space occupied by a right circular cone, calculated as (1/3)πr²h.

    Surface Area of a Sphere

    The total area covering the surface of the sphere, calculated as 4πr².

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    Volume of a Sphere

    The amount of space contained within a sphere, calculated as (4/3)πr³.

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    Study Notes

    Surface Area of a Right Circular Cone

    • The lateral surface area of a right circular cone is the area of the curved surface, excluding the base.
    • Calculated using: Lateral Surface Area = πrl, where 'r' is the base radius and 'l' is the slant height.
    • Slant height 'l' found using the Pythagorean theorem: l² = r² + h², where 'h' is the cone's height.
    • Total surface area is the sum of lateral surface area and base area.
    • Total Surface Area = πrl + πr².

    Volume of a Right Circular Cone

    • Volume of a right circular cone is the space it occupies.
    • Calculated using: Volume = (1/3)πr²h, where 'r' is the base radius and 'h' is the height.

    Surface Area of a Sphere

    • Surface area of a sphere is the total area of its surface.
    • Calculated using: Surface Area = 4πr², where 'r' is the radius.

    Volume of a Sphere

    • Volume of a sphere is the space it occupies.
    • Calculated using: Volume = (4/3)πr³, where 'r' is the radius.

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    Description

    Test your understanding of the surface area and volume calculations for right circular cones and spheres. This quiz covers key formulas and concepts essential for solving geometric problems involving these shapes.

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