AQA · Mathematics · 8300
GCSE Maths: Similar shapes: definition
Geometry & Measures · AQA GCSE Maths (8300). Cards are generated from the Corbettmaths practice questions for Similar shapes: definition (Corbettmaths Video 291), and every card links back to the exact page it came from. Practice tests are drawn from this deck’s own cards. Source material © Corbettmaths — used with attribution.
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What does it mean for two shapes to be congruent?
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They are identical in size and shape; they can be placed exactly on top of one another.
What does it mean when one shape is an enlargement of another?
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The two shapes are similar: they have the same shape but different sizes, with corresponding angles equal and sides in proportion.
What is the scale factor of an enlargement?
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The ratio by which each side length of the original shape is multiplied to produce the enlarged shape.
Can two shapes be similar but not congruent?
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Yes. Similar shapes have the same shape but can differ in size; congruent shapes are identical in both size and shape.
In similar shapes, what is true about corresponding angles?
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Corresponding angles are equal.
In similar shapes, what is true about the ratios of corresponding side lengths?
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The ratios of corresponding side lengths are all equal (they are in proportion).
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