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what is the math formula for a circle. Notice that if the circle is centered at the origin 0 0 then both h and k in the equation above are 0 and the equation reduces to what we got in the previous section. 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.
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Notice that if the circle is centered at the origin 0 0 then both h and k in the equation above are 0 and the equation reduces to what we got in the previous section. D 2 r. X - h 2 y - k 2 r 2.
A 12 x C x r.
X a 2 y b 2 r 2. Diameter of a circle D A07854. D is symbol for diameter of circle. If the length of the radius and distance between the center and chord are known then the formula to find the length of the chord is given by Length of chord 2 r2 d2.
