Circle Tangent to Two Circles
Creates a circle tangent to two existing circles. Type selector specifies XL/XS/YL/YS position. Tangency selector specifies Out/Out, In/In, Out/In, or In/Out.
What It Does
The Circle/Tan/To/C1,C2 operator creates a circle of specified radius that is tangent to two existing circles. The Type selector (YS/YL/XS/XL) determines the position of the new circle centre. The Tangency selector determines whether the new circle is externally or internally tangent to each reference circle.
Syntax
Quick Input
Direction Selector
The Type selector (YS/YL/XS/XL) picks which of the multiple possible circle positions to use based on the centre coordinate. The Tangency selector specifies whether the new circle is externally (Out) or internally (In) tangent to C and C2 respectively.
| Tangency | Meaning |
|---|---|
Out/Out | New circle externally tangent to both C and C2 |
In/In | New circle internally tangent to both C and C2 |
Out/In | Externally tangent to C, internally tangent to C2 |
In/Out | Internally tangent to C, externally tangent to C2 |
Worked Examples
Analytic Rule
FAQ
What does Out/Out mean?
Out/Out means the new circle is externally tangent to both reference circles — it sits outside both of them touching each one at one point.
What does In/In mean?
In/In means the new circle encloses both reference circles, touching each one internally.