Circle Diameter = 18

Publish date: 2024-04-20
Circle Diameter = 18 MathCelebrity logo Image to Crop

A circle has Diameter = 18

Calculate Area, Circumference, Radius

Calculate radius (r):

d = 2r

Rearranging the equation, we get:
r  =  d
  2

r  =  18
  2

r = 9

Calculate circumference (C):

C = 2πr

C = 2π * 9

C = 18π or 56.5487

Calculate Area (A):

A = πr2

A = π * 92

A = 81π or 254.469

Final Answers

r = 9
C = 18π or 56.5487
A = 81π or 254.469

You have 1 free calculations remaining


What is the Answer?

r = 9
C = 18π or 56.5487
A = 81π or 254.469

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


Tags:

Add This Calculator To Your Website

ncG1vNJzZmivp6x7rq3ToZqepJWXv6rA2GeaqKVfmLazr8ueZamgoHS7trmcam9fqJxykaqtzJ6rnqpWqcaxsZx9oJqllamys3LSoaawl3GhuX59