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14 votes
Help me please given ABcd is a parallelogram

Help me please given ABcd is a parallelogram-example-1
User Ncaralicea
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1 Answer

19 votes
19 votes
  • AC is congruent to AC (reflexive property)
  • Triangle CDA is congruent to triangle ABC (SAS)
  • AB is congruent to CD, BC is congruent to DA (CPCTC)
User Qiuyu ZHANG
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