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# CIRCLE

Welcome to Class !!

We are eager to have you join us !!

In today’s Basic Technology class, We will be discussing Circle. We hope you enjoy the class!

## CIRCLE

circle is a simple shape, consisting of those points in a plane that are a given distance from a given point – the centre.

Origin: The centre of a circle.

Radius: The distance from the centre of a circle to any point on it.

Diameter: The longest distance from one end of a circle to the other. The diameter = 2 × radius (d = 2r).

Circumference: The distance around the circle.

Circumference = π×diameter.

Circumference = π×d = 2×π×r

Arc: a curved line that is part of the circumference of a circle.

The arc of a circle is measured in degrees or radians – for example 90° or \displaystyle \frac{\pi}{2}2π​ – a quarter of the circle,
180° or \displaystyle \piπ – half of the circle.
The arc is smaller than 360°(or \displaystyle 2\pi2π) because that is the whole circle.

Chord: a line segment within a circle that touches 2 points on the circle.

Sector: is like a slice of pie (a circle wedge).

Tangent: a line perpendicular to the radius that touches ONLY one point on the circle.

We have come to the end of this class. We do hope you enjoyed the class?

Should you have any further question, feel free to ask in the comment section below and trust us to respond as soon as possible.

We have come to the end of first term. Its been an amazing journey with you and we can’t wait for you to join us in Second Term!!

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