6. Justify the last two steps of the proof.
Given: ABCD is a parallelogram.
Prove: A4BC = ACDA
A
B
1. ABDC is a parallelogram.
2. AB DC and BC= DA
3. AC = CA
4. JABC = ACDA
D
1. Given
2. Opposite sides of a parallelogram are congruent.
3.
C
4.
?
