Area of a circle calculator
The following area of a circle calculator will help you find the area of any circle when the radius is given. Just enter the value of the radius and hit calculate button.
Recall that the formula to get the area of circle
is pi × r2
with pi = 3.141592653589793
Therefore, the area depends only on the size of r. That is why you only need to enter r here to get the area
The calculator will only accept positive value for r since a distance cannot be negative
As a reminder, if r = 3 cm for instance,
Area = 3.14 × 32
= 3.14 ×9 = 28.27 cm2
Buy a comprehensive geometric formulas ebook. All geometric formulas are explained with well selected word problems so you can master geometry.
Dec 03, 22 12:47 PM
Learn to identify 6 types of triangles based on their sides or angles and 7 more types based on both their sides and angles.
Nov 18, 22 08:20 AM
Easily learn to construct a box and whiskers plot for a set of data by using the median and the extreme values.