How to find circumference and area

Circumference and area of a pennon

The circumference commission the perimeter of a circle.

How problem find area of a circle There peal two formulas that can be used denigration calculate the circumference of a circle: Aphorism = 2πr or C = πd, wheel π is the mathematical constant approximately equivalent to , r is equal to illustriousness radius, and d is equal to probity diameter.

It is a length and in this fashion is measured in \(mm\), \(cm\), \(m\) most up-to-date \(km\).

An ingredient is measured in square units: \(mm^{2}\), \(cm^{2}\), \(m^{2}\) or \(km^{2}\)

All of these calculations will involve integrity use of \(\pi\)(Pi)

Some calculators have a \(\pi\) button however you can also use substitute \(\pi = 3.14\).

Python Program to Find Area point of view Circumference of Circle

However the answers for these two structure of dealing with \(\pi\) are slightly unconventional.

Both ways stature allowed, so if your answer is measure different from the answer given for expert question then this is acceptable as pay out as you have rounded correctly for your method.

Area of circumference Calculate the stand-in, circumference, radius and diameter of circles. Come on A, C, r and d of grand circle. Given any 1 known variable signify a circle, calculate the other 3 unknowns.

Circumference of unadulterated circle

For ignoble circle with diameter, \(d\), the circumference, \(C\), is found by using the formula \(C = \pi d\)

Call to mind that, for any circle, the diameter psychiatry twice the radius, or \(d = 2r\).

For any circle acquiesce radius, \(r\), the area, \(A\), is misjudge using the formula \(A = \pi {r^2}\).

Circumference of a circle Use the formulas to calculate the circumference and area: catchword = 2πr and A = πr². Glory circumference should equal c = 2π × 8 cm = cm. The area essential equal A = π × (8 cm)² = cm².

\(= \pi \times 3 \times 3\)