
圓與直線的幾何問題
Quiz
•
Mathematics
•
9th Grade
•
Practice Problem
•
Hard
IMING LU
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5 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,那麼此四條直線中,哪一條與圓O只有一個交點?
L
M
N
H
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
如右圖,直線CD切圓O於C點,=4、=5,則圓O的半徑長為多少?
3
4
5
6
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
如右圖,是圓O上一弦,為其弦心距。已知=5公分、圓O的半徑為13公分,則弦的長度為多少公分?
12
13
24
26
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
如右圖,是半圓,O為的中點,C、D兩點在上,且//,連接、。若=62°,則=?
48°
52°
56°
60°
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
如右圖,AB、CD為圓O的直徑,E是圓O上一點,已知∠EAB=32°,∠DBA=34°,則=?
30°
32°
35°
48°
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