Two figures are congruent if they have
• Same shape and same size.
• Able to map onto each other under translation, reflection and rotation.
Which of the following are congruent figures by definition?

When quadrilateral \(ABCD\) is congruent to \(PQRS\) we write it as \(ABCD\equiv PQRS\).
The symbol “\(\equiv \)” means “congruent to”.

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