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Suppose you are given a bangle and you are supposed to measure the circumference. OK?

First place it on a paper fixed to a board. Using a fine pencil mark its boundary outer if outer circumference is required.

Now draw one chord. Mark AB. Using protractor draw a line perpendicular to the chord at B. Name as BC.

Join AC. Measure AC.

Multiply AC by 3.14. You would get the required circumference nearly to the accurate one.

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14y ago

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