Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
Three distinct lines, all contained in a plane, separate the plane into distinct regions.?
What are all of the possible numbers of distinct regions of the plane that may be separated by any 3 such lines?
(Note: Do not include any of the points on the 3 lines in your count of distinct regions.)
A. 3, 4, 7
B. 3, 6, 7
C. 4, 5, 6
D. 4, 5, 7
E. 4, 6, 7
1 Answer
- ?Lv 51 decade agoFavorite Answer
Cases:
If all three of them are parallel: we have 4 regions
If two of them are parallel and one is not: 6 regions
If no two lines are parallel: 7 regions
=> E.
Explanation: draw each case alone and count the regions.
