find the radius and circumference of a circle if area is 144pi cm sq.
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Let the radius be r.
Area of circle=144 pi cm^2
or, pi r^2 =144 pi
or, r^2 = 144
or, r = root 144
or, r =12 cm.
Therefore, circumference of the circle
=2 pi r
= 2×7 ×pi
= 14 ×22/7
=2×22
=44cm.
So, radius of the circle is 12cm and its circumference is 44cm.
Area of circle=144 pi cm^2
or, pi r^2 =144 pi
or, r^2 = 144
or, r = root 144
or, r =12 cm.
Therefore, circumference of the circle
=2 pi r
= 2×7 ×pi
= 14 ×22/7
=2×22
=44cm.
So, radius of the circle is 12cm and its circumference is 44cm.
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