Contact Triangle
The Triangle formed by the points of intersection of a Triangle 
's Incircle with . This is thePedal Triangle of with the Incenter as the Pedal Point (c.f., Tangential Triangle). Thecontact triangle and Tangential Triangle are perspective from the Gergonne Point.
References
Oldknow, A. ``The Euler-Gergonne-Soddy Triangle of a Triangle.'' Amer. Math. Monthly 103, 319-329, 1996.
- Knight's Tour
- Knot
- Knot Complement
- Knot Curve
- Knot Determinant
- Knot Diagram
- Knot Exterior
- Knot Linking
- Knot Polynomial
- Knot Problem
- Knot Shadow
- Knot Sum
- Knot Theory
- Knot Vector
- Knödel Numbers
- Kochansky's Approximation
- Koch Antisnowflake
- Koch Island
- Koch Snowflake
- Koebe Function
- Koebe's Constant
- Kollros' Theorem
- Kolmogorov-Arnold-Moser Theorem
- Kolmogorov Complexity
- Kolmogorov Constant