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Math Labs with Activity - To make a Right-Circular Cylinder

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Math Labs with Activity – To make a Right-Circular Cylinder

OBJECTIVE

To make a right-circular cylinder of given height and radius of base

Materials Required

  1. A sheet of chart paper
  2. A pair of scissors
  3. A geometry box
  4. A pencil
  5. A roll of Sellotape

Procedure
Step 1: Let the given height of the cylinder be h and radius of the base be r.
Step 2: Calculate the circumference of the base of the required cylinder as 2πr.
Step 3: From the chart paper cut out a rectangle ABCD having lengths 2πr and breadth h (see Figure 38.1).
Math Labs with Activity - To make a Right-Circular Cylinder 1
Step 4: Gently roll the rectangular piece of chart paper so that the side AD coincides with the side BC.
Join them together by using Sellotape as shown in Figure 38.1.

Result
Here we have learnt how to make a right-circular cylinder out of a rectangular sheet of paper.

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