True or false
1. we can draw many lines passing through 2 given points
2. we can draw many lines passing through 1 given point
3. we cannot draw any line passing through 3 given points
4. two different lines can only have 1 common point
5. three different lines cannot intersect at 1 point
6. we can draw 3 different lines from 3 collinear points
7. 2 parallel lines may have more than 1 common point
1T
2T
3F
4F
5F
6F
7F
đây hỉ là theo Đ/Án mình thôi nhé
1: F
2: T
3: F
4: F
5: F
6: F
7: F
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?
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.
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?
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
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?
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,...
It is just 1 point in 99 straight draw with 99 points remaining. So with 100 points, with all 99 . 100
As each line is repeated 2 times so have all :
\(\frac{99.100}{2}=4950\)( lines )
Answer : 4950 lines
given 5 points in which not any three points are collinear. Draw lines passing through the pair of points . How many lines are there?
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 ?
mình cũng ko rõ mình nghĩ là 7 bạn ạ
Given two parallel lines xy & zt. Three points A,B & C are on line xy, two points D & E are on line zt. Draw lines passing through the pairs of points. How many lines are there? (including xy & zt)
Give 5 points which not any three points are collinear. Draw lines passing through the pair of points. How many lines are there?
given a parallel line xy and zt. Three point A,B,C are on line xy, two point D,E are on line zt. Draws line passing through the pair of point. How many lines are there?
Given 20 points. Draw the lines through the 2 points of these 20 points. How many lines are there if only 3 of 20 points are aligned?
Nguyễn Cao Cường đã làm đúng nhưng cách giả đâu
