GCSE Maths (Edexcel)
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Geometry and Measures
Properties and Constructions
Similarity
7:41
Congruence & Similarity
Spec
R12
G6
G19
- Two shapes are similar if one shape is a larger or smaller version of the other
- Similar shapes can be obtained through enlargement, rotation, translation, or reflection
- Similar shapes have the same angles and corresponding sides in the same ratio
- Examples of shapes that are always similar include circles and regular polygons with the same number of sides
- Squares are similar to each other, but not all rectangles are similar
- Rhombuses with matching angles are similar, but not all rhombuses are similar even with proportional sides
- To determine if two shapes are similar, check the ratio of corresponding side lengths and if the angles match
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