# Quick Answer: What Is Circle In Mathematics?

## What is circle and its types?

A circle is the set of all points at a specific distance from a given point in two dimensions. concentric circles. Two or more circles that have the same center, but different radii. congruent circles. Two or more circles with the same radius, but different centers.

## What is circle and its formula?

A circle is a closed curve that is drawn from the fixed point called the centre, in which all the points on the curve are having the same distance from the centre point of the centre. The equation of circle with (h,k) center and r radius is given by: (x-h)2 + (y-k)2 = r2.

## What is a circle Class 6?

A circle is a simple closed curve and it is not a polygon. Below is the image of a circle. Parts of a Circle. Centre: The center point of the entire circle. Point C is the centre of the circle.

## Which is the best definition of a circle?

Definition: A circle is the set of all points in a plane that are equidistant from a given point called the center of the circle. By definition of a circle, all radii have the same length. We also use the term radius to mean the length of a radius of the circle.

## What are the two types of circle?

Congruent circles are circles that have the same radius but different centers. Concentric circles are two circles that have the same center, but a different radii. Intersecting Circles: Two circles may intersect at two points or at one point.

## What is Circle in simple words?

A circle is a round shaped figure that has no corners or edges. In geometry, a circle can be defined as a closed, two-dimensional curved shape.

## What are the 5 parts of a circle?

Names of parts of a circle

• Centre.
• Diameter.
• Circumference.
• Tangent.
• Secant.
• Chord.
• Arc.

## How do you calculate a circle?

The area of a circle is pi times the radius squared (A = π r²).

## What is a circle Class 10?

Circle: A circle is a collection of all points in a plane which are at a constant distance from a fixed point. Centre: The fixed point is called the centre. Radius: The constant distance from the centre is called the radius. Chord: A line segment joining any two points on a circle is called a chord.

## What are the three parts of a circle?

Summary: A circle is a shape with all points the same distance from its center. A circle is named by its center. The parts of a circle include a radius, diameter and a chord.

## What is the meaning of circle?

A circle is the round shape formed by all the points equidistant from a center point. The Greek word kirkos meant circle, but the word goes back even further to the Proto-Indo-European word kirk, which meant “to bend.” The noun refers to that round shape, while the verb form means to move around or surround something.

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## Who invented circle?

The greeks considered the Egyptians as the inventors of geometry. The scribe Ahmes, the author of the Rhind papyrus, gives a rule for determining the area of a circle which corresponds to π = 256 /81 or approximately 3. 16. The first theorems relating to circles are attributed to Thales around 650 BC.

## What do circles have in common?

A circle is all points in the same plane that lie at an equal distance from a center point. The circle is only composed of the points on the border. You could think of a circle as a hula hoop. It’s only the points on the border that are the circle.

## How do you explain circle to a child?

A circle is a shape that is made up of a curved line. It’s round, and all points on the curved line are an equal distance from the center point. This shape is two-dimensional, which means it’s flat. The black dot represents the center of the circle.

## What do you call the longest chord?

The longest chord of a circle should pass through the centre of the circle, only then will it acquire a length greater than any other. And, the chord that passes through the centre of a circle is called the diameter. Hence, the longest chord is the diameter. Hope you liked the answer. 