Area = 3.1 times (radius)2
The factor of '3.1' is the number we decided to substitute in place of 'pi'
in order to make the relationship approximate, rather than exact.
C=2(pi)r
It depends on the relationship between the rectangle and the circles.
Circumference of a circle is 2 x Pi x the radius
You need some more information about any of the circles, or about the relationship between the two circles, to answer this question.
any circles circumference divided by its diameter will equal pi, or 3.14159 approximately
The area of a circle is directly proportional to the square of its radius. If two circles have radii R1 and R2 , then the ratio of their areas is ( R1/R2 )2
Circles with the same radius are congruent circles.
It is: 2 to 1
The relationship between the radius and the diameter of a circle is that: radius = diameter /2
The relationship between the radius and area of a circle is as follows: Area of circle = 3.14 x Radius x Radius or 22/7 x Radius x Radius
The question is misguided. You do not use radius only on circles!
The area of a circle is defined by the equation A = πr^2 where π = pi (3.14...) A = Area r^2 = radius squared So, the radius of a circle squared multiplied by pi equals the area.