For a circle with a circumference of 15 you would divide 15 by 2 times 314 and round the decimal point to your answer of approximately 239. A Find the center and radius of the circle. The radius of the circle is the length of a straight line stretching from the center of the circle to the line of circumference.
The formula for circumference of a circle is 2pr where r is the radius of the circle and the value of p is approximately 227 or 314.
The equation tells you where the center of the circle is in the xy -plane and what its radius is. H and k are the x and y coordinates of the center of the circle x 9 2 y 6 2 100 is a circle centered at 9 6 with a radius of 10. It is equal to half the diameter. A circle is easy to make.