Question

Prove that pi = area /radius^2 or perimeter / diameter.

Answer 1

Area of circle = π x r^2
=>>>>>>>>>>=>
=>π x r^2 = area of circle
=>π = area of circle/r^2 ( by transversing)
Hence proved.

Answer 2

Answer:

Area of a circle whose radius is r =

π r^2

Hence,

Area/ r^2= πr^2/r^2

= π

Perimeter of a circle whose radius is r= 2πr

Hence,

Perimeter/ diameter=2πr/2r

=π

Therefore,

π=area/r= perimeter /diameter