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Lab Manual: Right Circular Cone | Lab Manuals for Class 10 PDF Download

Objective

To make a cone of given slant height and the circumference of circular base from circular portion experimentally.
Prerequisite Knowledge

  • Circumference of the circle.
  • Concept of sector of a circle.
  • Concept of pythagoras theorem.

Materials Required
Coloured chart papers, a pair of scissors, cello tape, geometry box.

Procedure

  • Draw and cut a circle from a coloured chart paper of radius equal to the given slant height say ‘l’ of the cone.Lab Manual: Right Circular Cone | Lab Manuals for Class 10
  • Mark a sector OAB such that major AB = circumference of the base of cone. i.e, if rbe the radius of cone then length of major arc AB =2πr.
  • Cut the sector AOB.
  • Fold the remaining paper by bringing the two radii OA and OB together.
    Lab Manual: Right Circular Cone | Lab Manuals for Class 10

Observation
When two radii are joined together, a cone is formed.
Lab Manual: Right Circular Cone | Lab Manuals for Class 10

Result
A cone of given slant height and circumference of base can be made experimentally.

Learning Outcome
Students will learn how to make a cone of given slant height and circumference of base from the sector of a circle. They will also learn how the radius of the circle becomes the slant height of the cone and the arc length of the circle becomes the circumference of the base of the cone.

Activity Time

  • Find x.
    Lab Manual: Right Circular Cone | Lab Manuals for Class 10
  • Find x.

Lab Manual: Right Circular Cone | Lab Manuals for Class 10

  • Find x.
    Lab Manual: Right Circular Cone | Lab Manuals for Class 10
  • Make a right circular cone of given slant height 13 cm and base radius 5 cm. Also find its height by measurement and by calculation.
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