Mathematics, 17.10.2019 13:20 edna27

Justify the last two steps of the proof.
given: abcd is a parallelogram.
prove: triangleabc = trianglecda

1. abdc is a parallelogram 1. given
2. ab = dc and bc =dc 2. opposite sides of a parallelogram are congruent
3. ac = ca 3. ?
4. triangleabc = trianglecda 4.?

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Justify the last two steps of the proof.
given: abcd is a parallelogram.
prove: triang...