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Mathematics 9 Online
OpenStudy (anonymous):

triangleLMO is congruent to triangleNMO by SSS. How do you know that side MO is congruent to side MO even though the pictured is not marked to show it? Triangle MLO and Triangle MNO. Side LM is congruent to side MN. Side LO is congruent to side NO. A. Reflexive property B. Symmetric property C. Vertical angles are congruent. D. CPCTC

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