You can find the coordinates of the intersection, contact and the center coordinates of the contact circle.

Function list:
*Intersection, contact calculation
- Intersection of the straight line and a straight line
- Intersection of the circle and circle
- Intersection of the line and circle
- Polar coordinates
- Rotation of point
- Line symmetry
- Tangent to circle and point
- Tangent to circle and circle
- Angle line in contact with the circle

*Circle tangent calculation
- Circle passing through the three points
- Circle tangent to the line and two points
- Circle tangent to a circle and two points
- Circle tangent to two lines and points
- Circle tangent to a circle and point and line
- Circle tangent to two circles and point
- Circle tangent to three straight lines
- Circle tangent to a circle and two straight lines
- Circle tangent to line and two circles
- Circle tangent to the three circles

*Calculation center of the circle
- Circle passing through the two points
- Circle tangent to point and line
- Circle tangent to circle and point
- Circle tangent to two straight lines
- Circle tangent to circle and line
- Circle tangent to two circles