
2-2-1 圓心角與弧的關係
Presentation
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Mathematics
•
9th Grade
•
Practice Problem
•
Easy
余金城 余金城
Used 5+ times
FREE Resource
23 Slides • 4 Questions
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Multiple Choice
如圖,圓O的半徑為5cm,∠AOB=60°,則 AB 弧= 度 ?
300
120
60
30
11
Multiple Choice
如右圖,圓O的半徑為5cm,∠AOB=60°,
則 AB 弧長= 公分?
5π/6
5π/3
5π
10π
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Draw
如右圖,兩同心圓的圓心為O,且兩圓的半徑分別為10cm、8cm,若AO⊥BO,則AB弧比CD弧多幾公分 ?
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Draw
如右圖,正五邊形ABCDE
的頂點皆在圓O上,則:
(1) ∠AOB= 度。
(2) ∠BOD= 度。
(要有計算過程)
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