# Properties of Triangles – EX-RADII

Properties of Triangles – EX-RADII Definition: The internal bisector of angle A and external bisectors of angles B, C of ΔABC are concurrent. The point of concurrence is called ex-centre of ΔABC opposite to the vertex A. It is denoted by I₁. The point I₁ is equidistant to the sides of the triangle. The circle Read more about Properties of Triangles – EX-RADII[…]