The circumference of a circle is 44cm.Find its radius and its area.

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bluesaanvi bluesaanvi

06-11-2015
English

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The circumference of a circle is 44cm.Find its radius and its area.

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AL2006 AL2006 · Answer 1 · 2015-11-10T19:06:11+01:00

The circumference of a circle is (pi) x (diameter).

Diameter = (circumference) / (pi)

Radius = 1/2 of the diameter = (circumference) / (2 pi)

= (44cm) / (2 pi) = 22cm/pi = 7 cm (rounded)

The area of a circle is (pi) x (radius)² =

   (pi) x (22cm/pi)² =

      (22cm)²/pi =

      (484 cm²)/pi = 154.1 cm² (rounded)

   =