Page 71 - Key Stage 3 Geometry

5 More on the Circle

In this chapter we shall be

looking at more features

relating to the circle. First a
few more definitions. In the

diagram on the left you can
see a circle with several

lines.

1. A chord is a line that
touches the circumference in two places, but

does not pass through the centre.

2. A sector is an area within the circle as shown in
purple.

3. A segment is an area of a circle that lies

between a chord and the circumference as
shown in yellow.

4. A tangent is an external line
that touches the circumference at

one place.

Consider a circle with two chords
connected to two radii as shown

in the diagram on the left. A is the

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