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Congruence and similarity in geometry

Geometry and measures • Mensuration and calculation

Key concepts

What you'll likely be quizzed about

  • Congruent figures are identical in shape and size.
  • If one figure can be transformed into another by rotation, reflection, or translation, they are congruent.
  • Examples include two triangles that can perfectly overlap when one is moved without resizing or reshaping.

Flashcards

Test your knowledge with interactive flashcards

How do you determine if two triangles are similar?

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Two triangles are similar if their corresponding angles are equal and the lengths of their corresponding sides are in proportion.

Key notes

Important points to keep in mind

Congruent shapes can be overlapped exactly.

Similar figures have proportional sides and equal angles.

Transformations can help establish congruence.

Use scale factors to compare similar figures.

Check angles for determining similarity.

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