Mathematics
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1 菱形性質的應用
如右圖,E為菱形ABCD內部一點,已知
△CDE 為正三角形,且∠BCD=108°,
求:(1)∠BEC= ? (2)<AEB=?
C
竿腰梯形性質的應用
4-3 特殊四邊形的性質
E
D
B
C
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