a=pi r²
a=pi (d/2)²
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Area of Circle = pi (radius)2 So , using this formula we can find the radius and also the diameter. Diameter = 2(radius)
The area of a circle is pi(radius)2 Radius is half the diameter. Simply divide the diameter in half and enter it into the equation 3.14(diameter/2)2
tell what the diameter (d) and radius(r) of each circle is by using this information
Using the Circumference And Area.
If you know the radiusGiven the radius of a circle, the diameter can be calculated using the formula:The Diameter is Twice the Radius, or D = 2RWhere R is the Radius.If you know the circumferenceIf you know the circumference of a circle, the diameter is found using the formula D= C/πwhere:C is the circumference of the circleπ is Pi, approximately 3.142