Answer:
The relation for the area of circle with radius , Diameter , circumference is
A=
× radius²
A = 
A = 
Step-by-step explanation:
Given as :
The formula for the area of circle =
× radius²
I.e A =
× radius²
<u>Now If we know radius then </u>
Area calculated as A=
× radius²
<u>If we know Diameter then</u>
Area calculated as
× (
)²
Or, A =
× (
)²
I,e A = 
<u>If we know the circumference then</u>
∵ circumference = c = 2 ×
× radius
or, c = 2 ×
× r
from here we calculate radius
I.e r = 
And So , Area ( A ) =
× radius²
I.e A =
× (
)²
Or, A = 
Hence The relation for the area of circle with radius , Diameter , circumference is
A=
× radius²
A = 
A =
Answer