None of them are parallel but D. is perpendicular. I'm sorry if this doesn't help...
40 can be gotten by multiplying 10 & 4
28 can be found by adding 10 + 10 + 4 + 4
so the side lengths are 4 & 10
Euclid of Alexandria is known as the father of modern geometry.
This questions stated differently so I’m assuming it’s 4?
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