Mathematics

# Difference Between Circle And Sphere

A circle and a sphere are both three-dimensional shapes, but they are different in some aspects. A circle is a two-dimensional shape that has all points the same distance from its center, known as its radius. A sphere, on the other hand, is a three-dimensional shape that is defined as the set of all points that are a fixed distance away from a central point, also known as its center, and that distance is its radius. In simple words, a sphere is a three-dimensional version of a circle.

## overview

many people are confused about these two shapes and think that both are the same. although the circle and sphere have perfect symmetry around their center points and both are circular objects there is a lot of difference between them.

talking about the circle, it’s a two-dimensional object while the sphere is a 3D object. all their points lie at the same distance known as r (radius) to their central point O.

## What is a Circle?

it is a locus of points that is equivalent to the given point at its center. the distance of any point on the circle from its center is known as the radius of the circle.

the area of a circle is equal to π 2  by having no volume .so, we can say a circle can be defined completely from its central point (O) to its radius (r). where r is the length of the radius.

in the purpose of geometry, a circle is a well-known and commonly used figure. as the circle is very popular every day using examples in many fields of sciences such as geology and geography. an ellipse is a modified shape of a circle. the formula of the circle to find its area having a radius r is πr2.

## What is a Sphere?

A Sphere is a three-dimensional object and geometrical shape in space. it is a locus of points having a fixed distance from the center of the sphere in space. the distance of any point on the sphere to its center is known as radius r.

on the other hand, half of the sphere is called a hemisphere. so, a big circle of spheres cuts it down into 2 hemispheres of equal lengths.  a great example of the sphere is playing any kind of ball on the ground such as a cricket ball, hockey ball, tennis ball, or football. all are examples of a sphere.

its diameter is a line that connects its two most distanced points through its center point and hence made the longest straight line.

a circle is a by-product of intersecting a sphere into two pieces. moreover, we can find the area of the sphere by using the formula 4πr2. to find the volume of the sphere we can use the following formula 4/3πr3. in both formulas, r represents the radius of the sphere.

## Key Points – Circle vs Sphere

• a circle is around an object in the plane while the other is in space.
• the circular shape is known as two-dimensional and the spherical shape is three-dimensional.
• we can only calculate the area of the circle but in the case of the sphere area and volume can be calculated.

## Example of Circle and Sphere

in both, there is a center at an equivalent distance called a focal point. all points are at the same distance from that focal point. the only difference is a circle is a two-dimensional plane while a sphere is a three-dimensional object. a common example of sphere is football, apple, marbles, etc. The wheel of a bicycle is an example of a Circle.

## FAQs (Frequently Asked Questions)

#### Is a circle a sphere?

no, a circle consider round in a two-dimensional plane and we can calculate its area only while the sphere is a plane in three-dimensional space. area and volume both can be calculated in the sphere.

#### How many circles make a sphere?

we need an infinite number of circles to make a single sphere.

#### What does a sphere look like?

it is a round-shaped space like a ball having a continuous surface without edges.

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