The circle is one of the most common shapes. Orbital lines of the planets in the solar system, wheels, molecules… Circles constantly appear before us. The formula for the area of a circle is useful for measuring the area covered by a circular area. For example; It helps you know how big a cover to buy to completely cover your round table. So how to find the area of a circle? Circle area calculation Here are the things you wonder about.
How to find the area of a circle?
The constant value used in calculating the area of the circle; is the number pi. The fractional numerical value of Pi is 22/7 and the decimal value is 3.14. Any of the pi values can be used depending on the equation and need. The area of a circle is found in square units (m2, cm2, in2, etc.).
Finding the area of the circle Let’s see how to proceed through an example question:
sample question; If the length of the radius of a circle is 4 units, calculate the area of the circle.
Solution; Radius (r) is given as 4 units. The number pi is 3.14. We know that pi times the radius squared gives the area of the circle. When the values are put in place; A = 3.14(4)². From here, the area of the circle is found to be 50.24 square units.
What is the formula for circle area ❎
In this formula, A is the area of the circle, π is pi (the ratio of the circle’s circumference to its diameter), r is the radius of the circle, and d is the diameter of the circle. This is the basic formula used to calculate the area of a circle.
The area diameter formula of a circle is also frequently asked. If the diameter of the circle is known, to calculate the area of the circle; The formula πd²/4 is used. In this formula, d is the diameter of the circle. The diameter of the circle is twice the radius of the circle. So d = 2r. If the circumference of the circle is known, the formula for the area of the circle is C²/4π. Circumference of the circle 2 x p xr It is calculated by the formula.
Alright, How to calculate the surface area of a circle? The surface area of a circle is the same as the area of the circle. In fact, when we say the area of a circle, we mean nothing other than the total surface area. Surface area is the area covered by the surface of a three-dimensional shape. The surface of a sphere will be spherical in shape but a circle is a simple planar two-dimensional shape. So technically we don’t use the term “surface area” to refer to the area of a circle; We just say the area of the circle. If the length of the radius or diameter or even the circumference of the circle is given, we can find the surface area. The formula for circle surface area is πr². Here ‘r’ is the radius of the circle and the value of π is approximately 3.14 or 22/7.
In this guide article, we will talk about common mathematical operations “How to find the area and perimeter of a circle?We explained step by step. We showed what is the formula for calculating the area of a circle if the diameter of the circle or its circumference is known.
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