Mathematics
Senior High
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2 ABCD 2UT, AD // BC,
AB=2, BC = 4, CD=√7, DA=1
のとき,この台形の面積Sを求めよ。
2
B
A1D
2
5√3
2
線を引いて考える ]
[点Aを通り辺 CD に平行な直
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