# Circle (A_{11}): The Schoch incircle

### Definition

The circle inscribed in the curvilinear triangle formed by the circles with centers A and B through C and the semicircle (O), introduced by Thomas Schoch [Dodge e.a. 1999]

### Properties

- This circle is member of the Woo family.

### Remark

The line through A_{11}, perpendicular to AB is called the *Schoch line*.

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