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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