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3-1 三角形的內角與外角-測驗1
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1.
5 points
(A)360°
(B)540°
(C)720°
(D)900°
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2. 下列哪一種三角形的內角和最大？
5 points
(A)銳角三角形
(B)鈍角三角形
(C)直角三角形
(D)一樣大
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3. 下列有關正六邊形的性質，何者不正確？
5 points
(A)每一內角為120°
(B)外角和是360°
(C)對角線有10條
(D)等邊又等角
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4. 若某正多邊形的一個內角是一個外角的3倍，則此多邊形是正幾邊形？
5 points
(A)正方形
(B)正六邊形
(C)正公園七邊形
(D)正八邊形
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5. 若一三角形其內角為x°、(3x＋20)°、4x°，則此三角形為何種三角形？
5 points
(A)正三角形
(B)鈍角三角形
(C)等腰三角形
(D)直角三角形
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6
5 points
(A)120°
(B)125°
(C)135°
(D)145°
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7. 已知一多邊形的內角和為900°，則此多邊形為何種多邊形？
5 points
(A)五邊形
(B)六邊形
(C)七邊形
(D)八邊形
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8.
5 points
(A)180°
(B)360°
(C)540°
(D)720°
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9.
5 points
(A)10°
(B)15°
(C)20°
(D)25°
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10.
5 points
(A)145°
(B)180°
(C)215°
(D)250°
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11.
5 points
(A)80°
(B)180°
(C)210°
(D)260°
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12.
5 points
(A)125°
(B)130°
(C)140°
(D)155°
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13.
5 points
(A)100°
(B)112°
(C)115°
(D)120°
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14.
5 points
(A)50°
(B)52°
(C)54°
(D)56°
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15.
5 points
(A)50°
(B)40°
(C)30°
(D)20°
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16.
5 points
(A)15
(B)18
(C)20
(D)22
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17.
5 points
(A)144°
(B)150°
(C)156°
(D)162°
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18.
5 points
(A)60°
(B)90°
(C)120°
(D)150°
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19.
5 points
(A)118°
(B)120°
(C)242°
(D)260°
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20.
5 points
(A)150°
(B)160°
(C)200°
(D)250°
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