Saturday, 12 November 2016

LENGTH OF AN ARC 1


Find the length of an arc if the radius of the circle is 40cm.

Solution

L = ∏r                but r = 40cm
      1800

L = ∏ x  40
             1800

L = ∏ x  40
             1800

L = 2∏ cm
      9

Hence length of an arc is 2∏/9 cm.


TRY THIS……………………



Find the length of an arc if the radius of the circle is 48mm.

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