Linked Questions
24 questions linked to/from How can I find the points at which two circles intersect?
0
votes
3
answers
7k
views
How to calculate the intersection of 2 circles? [duplicate]
I am working on making inverse kinematics for a game I am making so I decided that the best way to start would be to do it in 2D.
After asking some people how to do it, they said you need to ...
- 21
-1
votes
3
answers
907
views
How do you find the intersection(s) of two circles with equal radii? [duplicate]
I have two circles with the following equations:
\begin{equation*}
(x-a_1)^2+(y-b_1)^2=r^2 \\
(x-a_2)^2+(y-b_2)^2=r^2
\end{equation*}
The two radii are equal. How do you find the intersections of any ...
- 103
-5
votes
1
answer
478
views
Find the coordinates of the points where the two circles intersect. [duplicate]
The two circles are:
$1$) $$(x-2)^2 + (y+1)^2 = 25$$
$2$) $$(y-2)^2 + (x+1)^2 = 25$$
- 111
0
votes
0
answers
54
views
I want to write an algorithm for two circles intersection and touching cases . How can I do it with a quadtratic equation? [duplicate]
Given that two circles with coordinates (x1, y1) and (x2, y2) and radius r1 and r2 respectively . I need to find an equation , which can be used in code to to find the coordinates and the presence of ...
12
votes
5
answers
28k
views
Get location of vector/circle intersection?
I'm a coding guru, and I'm good with math - but only math that I know. Which isn't even at calculus level yet. So I'm hoping I can get some help here for my algorithm.
Say I have a circle. I know its ...
- 223
3
votes
1
answer
11k
views
How can I calculate a point's coordinates given distances from three other known points? [duplicate]
I have a trilateration-related problem that I'm unsure how to solve mathematically. I can see a solution is possible through geometry, but I'm unsure how to solve the resulting equations.
Given ...
- 301
3
votes
3
answers
2k
views
Math and equations for external tangent lines between two dissimilar circles?
I am trying to determine the maths behind drawing a line from the top of one circle to the top of another (and bottom to bottom). I am doing this for a programmatically generated CAD file, I currently ...
- 349
4
votes
0
answers
2k
views
Circle-Cirle Intersection
Sorry for asking a question like this (can't comment as my reputation is too low).
Could someone please explain this answer to me? Particularly the part, where the orthogonal vectors are declared? Why ...
2
votes
1
answer
1k
views
calculate points coordinates on plane from their distances matrix
Given a list of points on a plane is simple to generate a distances list between each pair of points.
Pseudo Code:
...
- 123
0
votes
2
answers
2k
views
Computing coordinates of vertices in a SSS triangle
Given that we know the lengths of the sides of a triangle (SSS), how can the coordinates of the vertices in the Euclidean plane of such a triangle be mathematically computed?
I'm especially looking ...
- 3
1
vote
1
answer
1k
views
How to check two arcs intersect each other
I have two arcs defined with the following information:
Origin, Radius, StartPoint, EndPoint, StartAngle & EndAngle
The angles are signed so you know which direction around the circle the arc goes....
- 480
2
votes
1
answer
522
views
Given the ratios of distances from three corners of a rectangle, find the coordinates of a point with said ratios.
I think the picture can explain it better than words, but I'm wondering how to figure this out. Given three ratios of distances from corners, not lengths (in the picture I set the base, $base=1$, to ...
2
votes
0
answers
1k
views
Determine third point of triangle when two points and all sides are known
I am solving basically the same problem as asked in this thread Determine third point of triangle when two points and all sides are known? I know 3 sides of a triangle and positions of two of them. ...
- 121
1
vote
2
answers
330
views
intersection points of two circles
I am trying to find the points at which two circles intersect. The circles I am working with are: $$(1) \qquad x^2+y^2 = \frac{9}{4}$$ $$(2) \qquad (x-2)^2+y^2=\frac9 4$$ I am following this answer: ...
- 165
0
votes
0
answers
373
views
I want to solve the intersections of two circles using matrices.
The equations of the circles are
$(x-h_1)^2+(y-y_1)^2=r_1^2$
and
$(x-h_2)^2+(y-y_2)^2=r_2^2$
If I can use matrices to solve for $(x,y)$, how? Also, I know there will be two answers. The one I am ...
- 1