GCSE Maths (AQA)

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Congruence

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Geometry and Measures Properties and Constructions

Congruence

5:37 Congruence & Similarity
Spec G7 G19
Previous Trapezia & Kites Next Congruence in Triangles
  • Congruent shapes have sides with equal lengths and equal corresponding angles
  • Two triangles with all sides the same length are congruent
  • Two shapes with all sides the same length might not be congruent if the angles between the sides are different
  • Similar shapes have equal corresponding angles but may be different in size
  • To determine if shapes are congruent, check if all sides are equal and if all corresponding angles are equal
  • If the sides and corresponding angles are equal, the shapes are congruent
  • If the sides or corresponding angles are not equal, the shapes are not congruent
  • It doesn't matter if you check the sides or corresponding angles first
  • If two shapes are congruent, they will have the same side lengths and equal corresponding angles
  • The placement of one shape on top of another can help determine if they are congruent

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