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如图,在正方形ABCD的外侧,作等边三角形ADE,连接BE,则∠AEB的度数为(...
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如图,在正方形ABCD的外侧,作等边三角形ADE,连接BE,则∠AEB的度数为( )
A.10°
B.15°
C.20°
D.12.5°
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