Circle Diameter = 18 ·

08 Jul 2024, 00:00

Circle Diameter = 18 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

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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

Circle Diameter = 18

A circle has Diameter = 18 Calculate Area, Circumference, Radius d = 2r r = 9 C = 2r C = 2 * 9 C = 18 or 56.5487 A = r2 A = * 92 A = 81 or 254.469 r = 9C = 18 or 56.5487A = 81 or 254.469