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
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
Give 5 points which not any three points are collinear. Draw lines passing through the pair of points. How many lines are there?
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)
LÀM VẬY ĐÚNG KO???
Bài thi số 1
Điền kết quả thích hợp vào chỗ (...):
12:09
Fill in the blank with the suitable number (Note: write decimal number with "the dot" between number part and fraction part. Example: 0.5)
Câu 1:
The succeeding number of -7 is 7
Câu 2:
Given that M is the midpoint of the segment AB. Calculate the length of the segment MB if AB = 10cm.
Answer: MB=5cm
Câu 3:
What is the absolute value of -4?
Answer: The absolute of -4 is4
Câu 4:
Find the value of
Answer: A=5
Câu 5:
Given that the distance from point a to point -1 on the number line is 7. Find a if a > 0.
Answer: a=6
Câu 6:
Find the opposite number of .
Answer: It is -28
Câu 7:
Find the greatest negative integer.
Answer: It is -1
Câu 8:
Given a segment AB = 4cm. Let C be a point such that A is midpoint of segment CB. Find the length of segment CA.
Answer: CA=4cm
Câu 9:
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?
Answer: There are 188 lines.
Câu 10:
Find the smallest natural number which has exactly nine divisors.
Answer: 36
sai rồi bạn ơi!câu 1:-6;câu 5:9.con lai thi ban dung het nhe
given 2 parrel lines xy and zt.Three point ABC are on line xy,two point DE are on line zt.Draw lines pasing throught the pair of points
Bài này mk dịch thoy chứ đa thì cần suy nghĩ
Cho haid đường thẳng song song xy và zt . có ba điểm abc trên đường thẳng xy hai điểm de trên đường zt . vẽ bao nhiêu đoưng thằng ở những điểm trên
