Table of Contents
Definition of the inscribed circle of a triangle
The theorem on the inscribed circle of a triangle
Properties of the inscribed circle’s center of a triangle
The inscribed circle’s radius. Formulas
The area of a triangle in terms of the inscribed circle’s radius
The distance between the inscribed circle’s center and the point of intersection of the medians
Property of the inscribed circle’s and a straight line
The distance from the vertex to the inscribed circle’s center. Formulas
Formulas for the circumscribed circle’s radius and the inscribed circle’s radius. Euler’s inequality
A circle inscribed into an orthotriangle