Résumé de la leçon

Bisecting Angle PQR Mark Points A et B from Q with an arbitraire radius Use A and B as centres to mark point C with another arbitraire radius Connect points C and Q Construct a Circle through points A, B and C Join points A and B to get line AB Join points B and C to get line BC Construct a perpendicular bisector to AB Construction a perpendicular bisector to BC Use the point of intersection of the two perpendicular bisectors as the centre of cercle O Draw a circle with a radius of OA transmettant through all three points using a boussole