# EMS Reference question N°021 Bisectors

- Author:
- M. Pilar Vélez

Proposed by Phillippe Richard in "Reference levels in mathematics in Europe at age16"
EMS Reference question N°021 Bisectors:
Michel wants to draw a triangle of which the bisectors of angles B and C are
perpendicular.
Can he succeed ?

## LocusEquation for the vertex C in a triangle ABC such that bisectors at A and B are perpendicular

Proposed by Phillippe Richard in "Reference levels in mathematics in Europe at age16"
EMS Reference question N°021 Bisectors:
Michel wants to draw a triangle of which the bisectors of angles B and C are
perpendicular.
Can he succeed ?