If the perimeter of a circle is 132m, find the area of the circle.(π=22/7)
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perimeter formula = 2¶r
perimeter = 132
then..
2¶r = 132
2× 22/7×r = 132
r = 132×7/2×22
r = 21
area formula = ¶×r×r
then ...
22/7×21×21
area = 1386sq
perimeter = 132
then..
2¶r = 132
2× 22/7×r = 132
r = 132×7/2×22
r = 21
area formula = ¶×r×r
then ...
22/7×21×21
area = 1386sq
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