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Difference Between Circle and Sphere

May 6, 2011 Posted by Olivia

Circle vs Sphere

Circle and sphere are both round in shape but whereas a circle is a figure, a sphere is an object. You can compare the two as a drawing of a tennis ball on a piece of paper and the ball itself in real life. A circle is a 2D figure whereas a sphere is a 3D object having volume. One can only calculate the surface area of a circle whereas it is possible to calculate the volume of a sphere. Earth is considered spherical in nature but when we draw the figure of earth on paper, it is a circle. Some people make the mistake of saying earth is circular in shape which is wrong and they should rather say it is spherical in shape. Here are some more differences between a circle and a sphere.

One thing common in both circles and spheres is that both have a perfect symmetry around their centers. All the points lying at a distance r from the center of the sphere or a circle form a sphere. The longest distance inside a sphere is double this distance r and is called the diameter of the sphere. To a mathematician, both the circle and a sphere are one and the same thing as a collection of all the points that are equidistant ® from the center of the circle or the sphere. In a plane a round object is called a circle but the same circle becomes a sphere in space.

The formulae for a circle are as follows

Circumference= 2 x Pie x r

Area= Pie x r x r

The formulae for sphere are as follows

Surface area= 4 x Pie x r x r

Volume= 4/3 x Pie r x r x r

In brief:

• A round object in a plane is a circle while it is a sphere in space

• A circle is a 2D figure while a sphere is 3D

Related posts:

Difference Between Ambition and GoalDifference Between Ambition and Goal Difference Between Irrational and Rational Numbers Difference Between Series and Sequence Difference Between Parabola and Hyperbola Difference Between Probability and Chance

Filed Under: Mathematics Tagged With: Circle, circular, figure, figure vs object, object, perfect symmetry, sphere, sphere and circle, sphere vs circle, spherical

About the Author: Olivia

Olivia is a Graduate in Electronic Engineering with HR, Training & Development background and has over 15 years of field experience.

Comments

  1. garvit says

    December 30, 2012 at 2:04 am

    mast for differance between sphere and circle

    Reply
  2. Abdul Rauf Channa says

    October 1, 2015 at 11:35 am

    Is ring a circle or sphere?

    Reply
  3. loonsrunningthecuckoosnest says

    December 1, 2016 at 6:22 pm

    “Some people make the mistake calling the earth a circle………..”

    Like God?

    Reply

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