Dhaka Secondary 2010/10
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Please don't post problems (by starting a topic) in the "Secondary: Solved" forum. This forum is only for showcasing the problems for the convenience of the users. You can post the problems in the main Divisional Math Olympiad forum. Later we shall move that topic with proper formatting, and post in the resource section.
Please don't post problems (by starting a topic) in the "Secondary: Solved" forum. This forum is only for showcasing the problems for the convenience of the users. You can post the problems in the main Divisional Math Olympiad forum. Later we shall move that topic with proper formatting, and post in the resource section.
Three points are taken on each of any three sides of a square. What is the total number of points taken on the other side given that a total of $45$ distinct straight lines can be drawn using these points?
- leonardo shawon
- Posts:169
- Joined:Sat Jan 01, 2011 4:59 pm
- Location:Dhaka
Re: Dhaka Secondary 2010/10
we need TWO Points to make a straight line. Given 3 points will make 3 lines. $(45-2)=42$ lines need 84 points. 3 points are given. So we need 81 more points to create straight lines among themselves.
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Ibtehaz Shawon
BRAC University.
long way to go .....
BRAC University.
long way to go .....