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2-2 垂直、平分與線對稱圖形-1
垂直與平分
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1. 已知線段AB的垂直平分線L交線段AB於M點，若線段AM＝8公分，則線段AB為多少公分？
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(A)4
(B)8
(C)12
(D)16
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2.
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(A)30°
(B)45°
(C)50°
(D)55°
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3. 射線BD為∠ABC的角平分線，若∠ABD＝35°，則∠ABC＝？
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(A)65°
(B)70°
(C)80°
(D)90°
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4.
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(A)4
(B)7
(C)14
(D)17
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5. 下列敘述何者正確？
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(A)一線段恰有一個中點
(B)一直線恰有一個中點
(C)兩直線的交點稱為垂足
(D)以上答案皆正確
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6.
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7.
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8.
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9. 承上題：若∠DOE＝32°，則∠BOC＝________度。
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10.
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