حل السؤال 6، 4024/21 مايو/يونيو 2022: Loci

1. 1Measure AB and mark its midpoint
2. 2Rule a line from D to this midpoint
3. 3Measure the angle between the path and DC: between 44° and 48°

Answer44 to 48 with correct ruled line drawn

1. 1325 m ÷ 50 = 6.5 cm, so draw an arc of radius 6.5 cm, centre B
2. 2Construct the bisector of angle BCD (points nearer CB than CD are on the CB side)
3. 3Shade the region inside the arc, on the CB side of the bisector and on one side of the path, choosing the side that gives the larger area

AnswerArc 6.5 cm centre B, angle bisector of angle BCD and correct region shaded

1. 1Measure the part of the path on the boundary of the shaded region: 2.6 cm to 3.0 cm
2. 2Actual length = 2.6 × 50 to 3.0 × 50 = 130 m to 150 m

Answer130 to 150