A circle with a radius of 7 feet has an area of 153.94 square feet.
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14ft
14ft x 12ft = 168 sq ft = 15.6 m2
A circle with a radius of 2.5 meters has an area of 19.63 square meters.
The circle's area is 314.159 cm2
The area of any circle is (pi) x (radius)2 .The area of half the circle is just half of that number.