Question

what is a circle ?????​

Answer 1

$\fbox{ \fbox{ \bold{ \large{ \: \: Circle \: \: }}}}$

The collection of all the points in a plane which are at a fixed distance (radius) from a fixed point (centre) in the plane is called Circle

$\large \bold{ \underline{Terms \: related \: to \: circle \: \: \: \: }}$

$\to$ Chord - a line segment joining two points on the circle is called a chord of the circle

$\to$ Diameter - a chord which passes through the centre of the circle is called a diameter of the circle

$\to$ Circumference - the length of the complete circle is called its circumference

$\to$ Arc - a piece of a circle between two points is called an arc

$\to$ Semicircle - the diameter of a circle divides the circle into two equal parts i.e into two equal arcs . each of these two arcs is called a semicircle

$\to$ Segment - the region between a chord and either of its arcs is called segment of the circular region

$\to$ Sector - the region between an arc and the two radii joining the centre to the end point of the arcs is called sector

$\to$ Semi Circular Region - when two arcs are semi circle , then both segments and both sector becomes same and each is known as semi circular region

Answer 2

$\huge\mathfrak\red{\boxed{\boxed{answer:-}}}$

$\huge\mathtt\purple{\underline{\underline{CIRCLE:-}}}$

A round plane figure whose boundary (the circumference)

consists of points equidistance from a fixed point (centre) is called a circle

CIRCUMFERENCE:

the distance of a circle is called circumference

$circumference = 2\pi r$

AREA:

the region enclosed by a circle is called circumference of the circle

$area = \pi {r}^{2}$

in this both cases 'r' is radius

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