Starter quiz
- A ______ is a shape such that every point on the circumference is equidistant to its centre.
- 'circle' ✓
- Which is the definition of a radius?
- any line segment that joins the centre of a circle to its edge ✓
- any line segment that joins one edge of a circle with another
- the furthest distance from one side of a circle to another
- the perimeter of a circle
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- In which image is the circumference labelled with a question mark?
The ruler measures in cm. How long is the radius of the circle?- 3.5 cm ✓
- 7 cm
- 7 cm
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- Which shapes can not be a circle?
- The diameter of a circle is 12 cm. Its radius is ______ cm.
- '6' ✓
Exit quiz
The image shows a pencil inside a pair of ______.- 'compasses' ✓
- When drawing a circle with a pair of compasses, where is the needle once the circle is complete?
- an arc of the circle
- at the centre of the circle ✓
- on the circumference of the circle
- part way across the radius of the circle
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- An ______ of a circle is part of the circle’s circumference.
- 'arc' ✓
- Which one of these images is not a correct way to hold a pair of compasses while drawing a circle or arc?
- Which part of a circle can be drawn by using a pair of compasses and rotating the pencil around the needle?
- an arc ✓
- a diameter
- a radius
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Aisha is about to use the pair of compasses to draw a circle. Which statement will be true, once it is drawn?- The circumference will be 10 cm.
- The diameter will be 10 cm.
- The radius will be 10 cm. ✓
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Worksheet
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Presentation
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Lesson Details
Key learning points
- A pair of compasses can be used to draw any circle.
- A pair of compasses can be used to draw circle with a particular radius.
- A pair of compasses can be used to draw part of a circle.
Common misconception
When drawing circles, pupils may find that the start and end of their arcs do not join together.
This can be caused by the pair of compasses opening or closing mid-drawing. Hold it with one hand and rest the pencil gently on the page.
Keywords
Pair of compasses - A pair of compasses is a tool which can be used to draw circles and arcs. A pair of compasses is sometimes referred to just as a compass.
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