考前概念複習 Lesson

0 Slides • 5 Questions

1

Multiple Choice

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？

1

L

2

M

3

N

4

H

2

Multiple Choice

如右圖，直線CD切圓O於C點，CD＝4、OD＝5，則圓O的半徑長為多少？

1

3

2

4

3

5

4

6

3

Multiple Choice

如圖，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？

1

12

2

13

3

24

4

26

4

Fill in the Blanks

5

Fill in the Blanks

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？

1

L

2

M

3

N

4

H

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