document.write( "Question 29510: I have the circumfernce, & I need 2 find the radius(r)& the diameter(d), What's the formula? \n" ); document.write( "
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I have the circumfernce, & I need 2 find the radius(r)& the diameter(d), What's the formula?
\n" ); document.write( "The formula for the circumference of a circle is
\n" ); document.write( "2(Pi)r= 2X(22/7)r where r is the radius of the circle
\n" ); document.write( "The value of the circumference is known according to the given data.Let it be V
\n" ); document.write( "So we have 2X(22/7)X(r) =V ----(1) where the constant V is known
\n" ); document.write( "That is 44r/7 = V
\n" ); document.write( "Multiplying by 7
\n" ); document.write( "44r = 7V
\n" ); document.write( "Dividing by 44
\n" ); document.write( "r = (7V/44)
\n" ); document.write( "And any diameter of a circle = twice the radius of that circle
\n" ); document.write( "Therefore d = 2r = 2X(7V/44) = (7V/22)
\n" ); document.write( "Answer: Given the circumference of a circle to be the value V
\n" ); document.write( "radius of the circle = (7V/44)
\n" ); document.write( " and diameter = (7V/22)
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