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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

What is the relationship between sides of similar polygons?

Click to reveal answer

The lengths of corresponding sides in similar polygons are proportional, maintaining the same ratio across the figure.

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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