2007-01-25 07:12:28 · 9 answers · asked by whoknows 1 in Science & Mathematics ➔ Mathematics
Rays are directional... that is a ray fom A to B is different from the one From B to A
so the answer will be 4P2 = 12
(1st point is chosen in 4 ways and 2nd in 3)
2007-01-25 07:20:54 · answer #1 · answered by Sandeep K 3 · 1⤊ 2⤋
Could it be... 3 in each direction? Think about that. You should draw the situation. There would be 6 total (because I am thinking that for three collinear points A B C, the ray from A through B is equivalent to the ray from A through C, so you should count them as the same ray, and only the endpoints really have to be counted).
2007-01-25 15:23:32 · answer #2 · answered by John D 3 · 0⤊ 0⤋
Do you mean coplanar? Collinear means that they are on the same line. Either way, it seems that each point will connect to three others because they are directional; so
4 points x 3 rays/point = 12 rays
2007-01-25 15:29:17 · answer #3 · answered by kellenraid 6 · 0⤊ 0⤋
The answer is 6.
A ray is defined by two points. So you can have a ray one way from each of the first three points and three going the other way for a total of 6.
2007-01-25 16:51:02 · answer #4 · answered by Northstar 7 · 0⤊ 0⤋
12
2007-01-25 15:20:27 · answer #5 · answered by Michele B 3 · 0⤊ 1⤋
8. One going each way on the line from each of the points.
The answer might wind up being 6 if somebody gets picky about having two of the points in the ray, so the "outward" ray from each of the endpoints would be eliminated.
2007-01-25 15:20:29 · answer #6 · answered by bequalming 5 · 2⤊ 0⤋
If the rays must contain all of the points, then just two.
2007-01-25 15:20:27 · answer #7 · answered by ZeroByte 5 · 1⤊ 1⤋
it must be 6
2007-01-25 15:30:56 · answer #8 · answered by Seto!! 3 · 0⤊ 0⤋
none
2007-01-25 15:32:39 · answer #9 · answered by Johnny 2 · 0⤊ 0⤋