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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  1. 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.

  2. 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.

  3. 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.

  4. 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.

  5. In similar shapes, what is true about corresponding angles?

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    Corresponding angles are equal.

  6. 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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