Circles: Parts & Construction

What this lesson covers

Circles: Parts & Construction is a 10-part Class 6 Mathematics lesson. Each part makes one point and then hands over to the next, so it can be read in a sitting or picked up again at the part you stopped on. It defines the idea in plain words before using it, works through an example step by step, breaks the topic into its parts and compares them, shows where it is used outside the textbook, names the mistakes that cost marks in an exam, ends with a recap of what to remember.

How it begins

A circle is the set of all points the same distance from a fixed point, the centre. That fixed distance is the radius. Everything else about circles follows from this one idea.

The 10 parts

1. The circle and its centre
2. Radius and diameter
3. Circumference, chord and arc
4. The diameter is the longest chord
5. Sectors and segments
6. Drawing a circle with compasses
7. Constructions with circles
8. Where marks go
9. What to remember
10. Watch one worked through