1. Circles

2. Is this a circle?
Why or why not?

3. No, it is not. Is this a circle?
It does not have points that are the same distance from the centre point.

4. What is a Circle?
A shape made up of points that are the same distance from the centre point.

5. Vocabulary
Centre
Diameter
Radius
Circumference

6. Centre
The centre is in the middle of the circle.

7. Radius
A radius is a line from the center of a circle to the outer edge.

8. Diameter
Diameter is a line in a circle that goes through the centre and has endpoints on the circle.

9. Circumference
Circumference is the distance around a circle.

10. How to Draw a Circle
Use a compass

11. Draw These Circles - Use a Compass
30 mm radius
5 cm diameter
20 mm radius
6 cm diameter