Understanding the centre of rotation
I can understand the minimum information required to fully describe a rotation.
Understanding the centre of rotation
I can understand the minimum information required to fully describe a rotation.
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Lesson details
Key learning points
- The centre of rotation can be on a vertex of the object .
- The centre of rotation can be lying inside the object .
- The centre of rotation can be lying outside the object .
- You need to give the centre, size and direction of rotation to fully describe a rotation .
Keywords
Centre of rotation - The centre of rotation is the fixed point about which an object is rotated.
Common misconception
The centre of rotation is always in the centre of an object.
The centre of rotation can be anywhere. If it's outside the shape, imagine it like a pole in the ground, attached to the object by a rope.
To help you plan your year 7 maths lesson on: Understanding the centre of rotation, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 7 maths lesson on: Understanding the centre of rotation, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
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The assessment exit quiz will test your pupils' understanding of the key learning points.
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Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.In which direction is this object being rotated?
Q2.This arrow is currently pointing in the W (west) compass direction. If this arrow is rotated clockwise, what is the first compass direction that it passes through?
Q3.Match the size an angle in degrees to its description.
a quarter turn
a half turn
a full turn
one and a half full turns
two full turns
two and a half turn turns
Q4.Sofia stands on the spot and rotates clockwise by a half turn and then rotates clockwise by a further three-quarter turn. In total, how many degrees has Sofia rotated by?
Q5.Sofia stands on the spot and rotates anti-clockwise by an angle between a quarter of a full turn and half of full turn. Which of these is a sensible answer for the size of Sofia's rotation?
Q6.Which of these is a suitable description for this rotation?
Assessment exit quiz
6 Questions
Q1.Which of these is the centre of rotation for this rotation?
Q2.Which of the following complete the full and accurate description of this anti-clockwise rotation?
Q3.Which of the following complete the full and accurate description of this clockwise rotation?
Q4.Which of the following complete the full and accurate description of this clockwise rotation?
Q5.An object is rotated by 180°. A pair of corresponding vertices on the object and image are joined with a line segment. Find the coordinates of the centre of rotation.
Q6.Which of the following complete the full and accurate description of this rotation?
