Frame 5 Questions of your own on each topic and solve them (Circumference and Area of a circle)
Answers
Answer:
Problems On Area And Circumference Of A Circle
Before looking at the perimeter and area of a circle, a basic understanding of perimeter and area is needed.
Perimeter Definition
Perimeter is associated with any closed figure like triangle, quadrilateral, polygons or circles. It is the measure of distance covered while going around the closed figure on its boundary.
For example, the perimeter of a square of side 2 cm = 8 cm, as we know that the square comprises of 4 sides having equal lengths, thus the total distance covered will be 4×2, which will be the total length (i.e. Perimeter)
Area Definition
Area means the actual space enclosed by a closed figure (or within the perimeter). It means all the points within the closed figure and not the boundary. This is actually measured as the square of length.
Now, coming to Perimeter of a circle, as explained above, it is the measure of distance going around the boundary of a circle. This distance is difficult to calculate exactly. Looking at various circles having different radii, it is easy to visualize that the distance to go around is larger in a circle of larger radius than a smaller radius. Hence, perimeter is a function of the radius of a circle. In case of circle we generally use the term CIRCUMFERENCE instead of perimeter.
It is given by p=2πr
(Here r is a radius and π is a constant and actually defined as the ratio of circumference to the diameter of a circle).
The value of π is 3.1416
Circumference Formula of a Circle is given by
C=2πr
Answer:
pi r square and 2 pi r is area and circumference