We can say that the line segment joining the centre to the point on the circle is called the radius of the circle. The fixed distance from the point on the circle to the centre of a circle is called the radius of the circle. The fixed point of the circle, from where all the points are drawn with equal distance, is known as the centre of a circle.
The different terms associated with the circle are discussed below: The fixed point is called the centre of the circle, and the fixed distance is named the radius of the circle. The locus of the set of all points in a plane, which is at equal distances from a fixed point, is called a circle. In this article, we will discuss in detail about the perimeter and area of a circle and more.
AREA OF CIRCLE FORMULA HOW TO
The interactive below shows how to calculate pi’s value. The ratio of the circumference to the diameter of any circle is. The ratio of a circle’s circumference (perimeter) to its diameter had been known for a long time. To approximate, he drew a regular polygon within the circle, and the more sides he drew on the polygon, the better the approximation he would achieve. The space or region enclosed by a circle is called the area of the circle.Īrchimedes, a Greek mathematician, is credited with devising the method for calculating the value of pi. The length of the boundary of the circle is called the perimeter or circumference of a circle. In our daily life, we see many circular objects around us like a ring, bottom of a bottle, a steering wheel, etc. So, the circumference of the circle is 31.4 mm.Perimeter and Area of Circle: Circle is a very important geometric figure. What is the circumference of a circle whose area is 78.5 mm 2? It is possible to calculate the area of a circle given its circumference.įind the area of a circle whose circumference is 25.12 cm. Area of a circle using the circumferenceĪs we already know, the circumference of a circle is the distance around a circle. Thus, the diameter of the circle will be 14.1 m. Therefore, the dimensions of the square plate will be 17.72 cm by 17.72 cm.įind the diameter of a circle with an area of 156 m 2. Find the dimensions of a square plate that will have the same area as the circular plate.Įquate the area of the circle to the area of the squareįind the square root of both sides to get, The diameter of a circular plate is 20 cm. So, the area of the circle with a diameter of 6 inches is 28.26 square inches.Ĭalculate the area of a dinner plate, which has a diameter of 10 cm. When the diameter of a circle is known, the area of the circle is given by,įind the area of a circle with a diameter of 6 inches.
Therefore, the area of the sprinkled lawn is 314 sq. Lawn sprinkler sprays water 10 feet in every direction as it rotates. Since the radius cannot have a negative value, we take positive 9 as the correct answer. The area of a circle is 254.34 square yards. Let’s get a better understanding of this formula by working out a few example problems.įind the area of a circle whose radius is 15 mm.Ĭalculate the area of the circle shown below. Pi (π) = 22/7 or 3.14 and r = the radius of a circle. Given the radius of a circle, the formula for calculating the area of a circle states that: Let us discuss these formulas for finding the area of a circle. These formulas are applied depending on the information you are given. The area of a circle can be calculated using three formulas. We can measure the area of a circle in m 2, km 2, in 2, mm 2, etc.
AREA OF CIRCLE FORMULA FULL
Then, the total number of full squares located inside the circle represents the area of the circle. In simple words, the area of a circle is the total number of square units inside that circle.įor example, if you draw squares of dimensions 1cm by 1cm inside a circle. The area of the circle is the measure of the space or region enclosed inside the circle. In this article, you will learn the area of a circle and the formulas for calculating the area of a circle. To recall, the area is the region that occupied the shape in a two-dimensional plane.
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