What is perimeter and area of circle.Please answer by double checking the question or it will reported
Answers
Answer:
Circumference of the circle or perimeter of the circle is the measurement of the boundary of the circle.
Step-by-step explanation:
Area of a circle is the region occupied by the circle in a two-dimensional plane. It can be determined easily using a formula, A = πr2, (Pi r-squared) where r is the radius of the circle. The unit of area is the square unit, such as m2, cm2, etc.
Area of Circle = πr2 or πd2/4, (square unit) where π = 22/7 or 3.14
This area formula is useful for measuring the space occupied by a circular field or a plot. Suppose, if you have the plot to fence it, then the area formula will help you to check how much fencing is required. Or suppose if you have to buy a table cloth, then how much portion of cloth is needed to cover it completely.
Hence, the concept of area as well as the perimeter is introduced in Maths, to figure out such scenarios. But, one common question arises among most of the people is “does a circle have volume?”. The answer is “No”. Since a circle is a two-dimensional shape, it does not have volume. It has only area and perimeter. So, we don’t have the volume of a circle. In this article, let us discuss in detail about the area of a circle, surface area and its circumference with examples.
Table of Contents:
Circle Definition
What is Area of Circle
Area Formula
Derivation
Using Area of Rectangle
Using Area of Triangle
Surface Area
Circumference
Calculation
Square Area and Circle Area
Video Lesson
Examples
FAQs
What is a Circle?
A circle closed plane geometric shape. In technical terms, a circle is a locus of a point moving around a fixed point at a fixed distance away from the point. Basically, a circle is a closed curve with its outer line equidistant from center. The fixed distance from the point is the radius of the circle. In real life, you will get many examples of the circle such as a wheel, pizzas, a circular ground, etc. Now let us learn, what are the terms used in the case of a circle.
Radius
The radius of the circle is the line which joins the centre of the circle to the outer boundary. It is usually represented by ‘r’ or ‘R’. In the formula for area and circumference of a circle, radius plays an important role which you will learn later.
Diameter
The diameter of the circle is the line which divides the circle into two equal parts. In an easy way we can say, it is just the double of the radius of the circle and is represented by’d’ or ‘D’. Therefore,
d = 2r or D = 2R
If the diameter of the circle is known to us, we can calculate the radius of the circle, such as;
r = d/2 or R = D/2