Given 100 points with any 3 points non-aligned. Draw all the line passing through any 2 of these points. How many lines are there?
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Given 100 points with any 3 points non-aligned. Draw all the line passing through any 2 of these points. How many lines are there?
With 100 points, then we draw are:
100 x 99 : 2 = 4950 ( lines )
Answer: 4950 lines
![](https://rs.olm.vn/images/avt/0.png?1311)
Đề bài:
Given 100 points with any 3 points non-aligned. Draw all the line passing through any 2 of these points. How many lines are there?
With 100 points, then we draw are:
100 x 99 : 2 = 4950 ( lines )
Answer: 4950 lines
The number of lines is :
\(\frac{100.99}{2}=4950\)
So,...
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Chọn 1 điểm , làm như vậy với 4 điểm còn lại . ta có 5.4 đt nhưng lại bị lặp 2 làn nên có 5.4:2 = 10 đt
Dịch :
Cho 5 điểm trong đó không có ba điểm thẳng hàng. Vẽ đường thẳng đi qua các cặp điểm . Có bao nhiêu đường thẳng ?
Given 100 points with any 3 points non-aligned. Draw all the line passing through any 2 of these points. How many lines are there?
This is my exercise:
It is just 1 point in 99 straight draw with 100 points remaining. So with 100 points, with all 99.100
As each line is repeated 2 times so have all :
99.100 / 2 = 4950 (lines)
Answer: 4950 lines.