Circle diameter = 3

Circle diameter = 3

A circle has diameter = 3

Calculate Area, Circumference, Radius, Diameter

Calculate radius (r):

d = 2r

Rearranging the equation, we get:

r  =	d
	2

r  =	3
	2

r = 1.5

Calculate circumference (C):

C = 2πr

C = 2π * 1.5

C = 3π or 9.4248

Calculate Area (A):

A = πr2

A = π * 1.52

A = 2.25π or 7.0686

Final Answers

r = 1.5
C = 3π or 9.4248
A = 2.25π or 7.0686

You have 1 free calculations remaining

What is the Answer?

r = 1.5
C = 3π or 9.4248
A = 2.25π or 7.0686

How does the Circles Calculator work?

Free Circles Calculator - Calculates and solves for Radius, Diameter, Circumference, and Area of a Circle.
This calculator has 1 input.

What 3 formulas are used for the Circles Calculator?

What 7 concepts are covered in the Circles Calculator?

areaNumber of square units covering the shapecirclethe set of all points in the plane that are a fixed distance from a fixed pointcirclescircumferencethe perimeter of a circle or ellipsdiameterdistance from two endpoints of a circle through the center
d = 2roriginOn a two digit coordinate plane, the point (0, 0), where the x-axis and y-axis cross.radiusDistance from the center of a circle to the edge
C/2π

Example calculations for the Circles Calculator

Circles Calculator Video

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