CIRCLE

Back to: BASIC TECHNOLOGY JSS2

 

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

 

CIRCLE

A 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?

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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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