حل السؤال 12، 4024/12 مايو/يونيو 2020: Removed from the 2025–27 syllabuses (parked)

1. 1Set compasses to 5 cm, put the point on B
2. 2Draw the arc inside the triangle between AB and BC

AnswerArc, centre B radius 5 cm

1. 1With the same radius (more than half AC) draw arcs from A and from C, above and below AC
2. 2Rule the line through the two crossing points: the perpendicular bisector of AC
3. 3Leave the construction arcs showing

AnswerAcceptable bisector of AC with correct arcs

1. 1Shade inside the triangle, inside the arc centre B (less than 5 cm from B)
2. 2and on the A side of the perpendicular bisector of AC (closer to A)

AnswerCorrect region shaded