Big Bieber: If the dimensions of an object double, its volume increases by a factor of eight.
Middle of Centres: Find the midpoint of the line joining the centres of enlargement.
Star Wars Day: Estimate the size of an alien given the size of their hand. This could be an introduction to scale factors.
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Comment recorded on the 23 September 'Starter of the Day' page by Judy, Chatsmore CHS:
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When areas and volumes are enlarged the results are far from intuitive. Doubling the dimensions of a rectangle produces a similar shape with four times the volume! Doubling the dimensions of a cuboid produces a similar shape with eight times the volume!
Similar Shapes: Questions about the scale factors of lengths, areas and volumes of similar shapes.
Transformations: Draw transformations online and have them instantly checked. Includes reflections, translations, rotations and enlargements.
Enlargement by a scale factor: A Maths teacher goes through the idea of enlarging a shape from a centre of enlargement.
Enlargements: How to enlarge a shape by a positive scale factor and a centre of enlargement. Includes a scale factor less than 1 and a centre of enlargement inside the shape.
Enlargements External Links:
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