B C С
2
Given: AB = CD,
BC = DA
Prove: ABCD is a parallelogram.
Proof:
4
3
D
A
Statements
Reasons
1. Given
2. a.
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3. c.
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1. AB = CD BC = DA
2. BD BD
3. ADAB = b. 2
4. 1 d. 2 24 = e.
5. AB CD, BC || DA
6. ABCD is a parallelogram.
2
4. CPCTC
5. f.
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6. g
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