To determine which theorem can be used to prove △GHI ≅ △GJI, we need to consider the information typically used for triangle congruence:
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SAS (Side-Angle-Side) Congruence Theorem: Two triangles are congruent if two sides and the included angle of one triangle are respectively equal to two sides and the included angle of another triangle.
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SSS (Side-Side-Side) Congruence Theorem: Two triangles are congruent if all three sides of one triangle are equal to all three sides of another triangle.
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ASA (Angle-Side-Angle) Congruence Theorem: Two triangles are congruent if two angles and the included side of one triangle are respectively equal to two angles and the included side of another triangle.
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AAS (Angle-Angle-Side) Congruence Theorem: Two triangles are congruent if two angles and a non-included side of one triangle are respectively equal to two angles and a corresponding non-included side of another triangle.
To accurately select the correct theorem, I would need more details about the specific sides and angles provided in your diagram or a description of the triangle relationships. However, here's a guideline on how to use the options based on typical cases:
- If two sides and the included angle are known: Use SAS.
- If all three corresponding sides are known: Use SSS.
- If two angles and the included side are known: Use ASA.
- If two angles and a non-included side are known: Use AAS.
If you can provide more details from the diagram, I can help you choose the appropriate theorem more accurately!