Reference

The inradius( r ) of a regular triangle( ABC ) is the radius of the incircle (having center as l), which is the largest circle that will fit inside the triangle. Circumradius: The circumradius( R ) of a triangle is the radius of the circumscribed circle (having center as O) of that triangle.

Centroid of triangle: is the point where the three medians of the triangle intersect. The center of gravity of the triangle. The centroid is exactly two-thirds the way along each median and its always inside the triangle.

Circumcenter is the point where the three perpendicular bisectors of a triangle meet.

Incenter of triangle: is the point where the three angle bisectors of a triangle meet. The incenter is the center of the triangles incircle, the largest circle that will fit inside the triangle and touch all three sides

Excenter of triangle: is the point where the bisector of one interior angle and bisectors of two external angle bisectors of the opposite side of the triangle intersect.

Given the coordinates of the three vertices of a triangle ABC and three sides a,b,c, the task is to calculate the excenter of a triangle.

Hit the check  done_outline   button to compute