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I can use the rHL postulate to prove right triangles congruent. This image shows how two triangles can be proved congruent by rHL.

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I can use overlapping triangles in proofs. This image shows an example of how to work with overlapping triangles to prove a congruent part.

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I can apply the principle of CPCTC. This image shows an example of when and why to use CPCTC as reasoning in a proof.

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I can apply the ASA postulate. This image shows how two triangles can be proved congruent by ASA.

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I can apply the SAS postulate. This image shows how two triangles can be proved congruent by SAS.

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I can apply the SSS postulate. This image shows two triangles that can be proved congruent by SSS.

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I understand the concept of congruent figures. This image shows how congruent triangles are marked.