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3-3垂直平分線與角平分線的性質--測驗1
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1.
5 points
(A)50°
(B)58°
(C)60°
(D)68°
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2. △ABC為等腰三角形，AB＝AC，則下列敘述何者錯誤？
5 points
(A)∠A可能是鈍角
(B)∠B＝∠C
(C)∠B可能是鈍角
(D)若AD為BC上的高，則BD＝CD
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3.
5 points
(A)5°
(B)6°
(C)8°
(D)10°
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4.
5 points
(A)50.5°
(B)54.5°
(C)60.5°
(D)67.5°
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5.
5 points
(A)13
(B)14
(C)15
(D)16
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6.
5 points
(A)11
(B)12
(C)14
(D)15
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7.
5 points
(A) 3
(B) 8/3
(C) 5/2
(D) 2
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8.
5 points
(A)作BC與AB垂直平分線的交點
(B)作∠A與∠B平分線的交點
(C)作BC垂直平分線與∠B平分線的交點
(D)作∠C的平分線與AB垂直平分線的交點
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9.
5 points
(A)50°
(B)55°
(C)60°
(D)65°
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10.
5 points
(A)42°
(B)45°
(C)46°
(D)48°
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11.
5 points
(A)44°
(B)45°
(C)46°
(D)47°
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12.
5 points
(A)4
(B)5
(C)6
(D)7
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13.
5 points
(A)15
(B)16
(C)17
(D)18
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14.
5 points
(A)108°
(B)116°
(C)124°
(D)128°
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15.
5 points
(A)3
(B)4
(C)5
(D)6
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16.
5 points
(A) 51/20
(B) 20/7
(C) 24/5
(D) 25/6
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17. 龍哥想在△ABC中找到一點P，使P點到B、C兩點的距離相等，且P點到∠B的兩邊距離相等，則下列尺規作圖的痕跡何者正確？
5 points
(A)
(B)
(C)
(D)
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18. 等腰△ABC中，若∠A＝46°，則下列何者不可能是∠B的度數？
5 points
(A)44°
(B)46°
(C)67°
(D)88°
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19.
5 points
(A)過B點作x軸的垂直線
(B)作∠BAO的角平分線
(C)作AB的垂直平分線
(D)作BO的垂直平分線
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20.
5 points
(A)18
(B)19
(C)20
(D)21
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