Question

dia to circumfance formula

Answer 1

circumference=2πr and
2r=d
so formula is=πd

Answer 2

hii!!

here's ur answer..

formula of finding circumference of the circle is 2πr.

instead of finding circumference with radius we can simply use this formula-πd

as we know diameter is double of radius. so no need to multiply radius by 2. simply multiply diameter with pi.

but it can't be use when we have to find circle's area. because at that time we have to find the square of radius.

hope this helps u..!

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