
九上數學2-1
Quiz
•
Mathematics
•
9th Grade
•
Practice Problem
•
Medium
蔡佩旻 蔡佩旻
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8 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
已知圓O的直徑為15公分,而圓心O到四條直線L、M、N、H的距離分別為15公分、10公分、7.5公分、5公分,那麼此四條直線分別和圓O有幾個交點,哪個正確?
L與圓 O 有 2 個交點
M與圓 O 有 1 個交點
N與圓 O 有 1 個交點
H與圓 O 沒有交點
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
在坐標平面上以原點 O 為圓心,半徑為 5 畫圓,已知坐標平面上八個點 A(3,3)、B(3,-4)、C(-3,3)、D(-4,-3)、E(0,-5)、F(-6,0)、G(4,4)、H(5,-5),則 A~H 八點中,有幾個點在圓外?
1
2
3
4
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
如右圖,直線L與圓O相切於P點,A點在直線L上,且與圓O相交於B點。已知PA=12,AB=6,求圓O的半徑為多少?
9
10
12
15
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
如右圖,有一下水道的截面為圓形,圓心為O點。某日上午下水道中的水深EN=5公分,水面寬CD=30公分。下午下了一場大雨,水深上升為EM=18公分,試問此時的水面寬度為多少公分?
48
25
24
20
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
如圖,四邊形 ABCD 的四邊分別與圓相切,已知 BC=7,CD=9,AD=13,則 AB=?
10
11
22
15
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
如右圖,AD、BC為圓O之兩弦,AD=6、BC=8,OM、ON分別為兩弦之弦心距。若ON=3,則下列何者錯誤?
圓O半徑為5
OM=3
OA=5
OC=5
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
右圖為兩同心圓(兩圓的圓心在同一點,稱為同心圓),其中AB為大圓的一弦,且切小圓於C點。若大圓半徑為10、AB=16,則大圓與小圓之間的環形區域(藍色區域)面積為多少?
8π
16π
32π
64π
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