Question

what is the formula of radious of circle​

Answer 1

Answer:

circumference=2pie(r)

radius=circumferece/2 pie

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Answer 2

If you know the diameter

Given the diameter of a circle, the radius is simply half the diameter:

radius =

D

2

where:

D is the diameter of the circle

If you know the circumference

If you know the circumference of a circle, the radius can be found using the formula

radius =

C

2 π

where:

C is the circumference of the circle

π is Pi, approximately 3.142

If you know the area

If you know the area of a circle, the radius can be found using the formula

radius = √

A

π

where:

A is the area of the circle

π is Pi, approximately 3.142