Answer:
The vertices of the parallelogram are at (-4, 0), (0, -3), (6, 0), and (2, 3).
P = 2√((-4)² + 3²) + 2√(6² + (-3)²)
= 2√(16 + 9) + 2√(36 + 9)
= 2√25 + 2√45
= 2(5) + 6√5
= 10 + 6√5
= about 23.42
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