Thursday, 13 March 2014

ARC LENGTH C1



Find the length of an arc if the radius of the circle is 20cm.

Solution

L = ∏r                but r = 20cm
      1800

L = ∏ x  20
             1800

L = ∏ cm
      9

Hence length of an arc is ∏/9 cm

TRY THIS……………….

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

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