Can you solve q9 ?? Thanks?
回答 (1)
2016-02-19 12:48 am
✔ 最佳答案
gradient = slopegradient of AB = (6 - 1)/(0 - 2) = -5/2
gradient of BC = (1 - 3)/(2 - 7) = 2/5
gradient of CD = (3 - 8)/(7 - 5) = -5/2
gradient of DA = (8 - 6)/(5 - 0) = 2/5
ii) Opposite sides have equal gradients.
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