The formula is: A = PI(r)^2
A circle with a radius of 29 cm has an area of 2,642.08 square cm.
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The radius of a circle is double its diameter. It would have a radius of 29/2, or 14.5 yards.
They are 4 points on the circle, and 29 on or in the circle.
Radius: 29/(2*3.14) = 4.618 rounded to 3 decimal places Area: 3.14*4.618 squared = 72.889 square m to 3 decimal places
Circumference of a circle = 2*pi*radius or diameter*pi
2 x pi x radius = circumfrance 2 x pi x radius = 29 29/ 2pi = radius radius = 4.62 (3 sig.fig.) 4 x pi x radius^2 = Surface area of sphere 12.56 x radius^2 = Surface area of sphere 12.56 x 4.62^2 = Surface area of sphere 268 cm2 (3 sig.fig)