Explanation:
In this question
d is known as diameter
r is known as radius
c is known as circumference
pi is known as π
a is known as area
Now, In Maths
Area of circle = π×r×r
Circumference of circle = 2×π×r
Radius (r) = diameter(d)÷2
Given diameter is 6
then, r = 6 ÷2
r = 3
so, diameter = 6
radius = 3
circumference = 2×π×r
= 2×3.14×3 ( the value of π is equal to 3.14)
= 18.84
Area = π×r×r
= 3.14×3×3 ( the value of π is equal to 3.14)
= 28.26
