How to get the new Coordinate of an Polygon at angle X


by abcplex
Tags: angle, coordinate, polygon
abcplex
abcplex is offline
#1
Mar7-12, 09:04 AM
P: 1
Let say I have a triangle(polygon). I know all the co-ordinates of all points(x1,x2,x3,y1,y2,y3). Let say the polygon is inclined(at x3,y3) and it's angle is 30 degree. How to get the point x4, y4?

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OldEngr63
OldEngr63 is offline
#2
Mar7-12, 08:57 PM
P: 343
You have not given a clear problem statement at all. To start, you have not really stated what the coordinate directions x and y are. Then you speak of the polygon being inclined; do you mean that it is tipped out of its original plane? If so, it would seem that the implied original x and y coordinates no longer have any meaning at all.

I suggest you try all over again, being sure that we can tell what you intend to say.
Bob S
Bob S is offline
#3
Mar10-12, 04:00 PM
P: 4,664
Use triangle law of sines:

http://en.wikipedia.org/wiki/Law_of_sines


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