Higher November 2020 Paper 3 Q6
6 ABCD represents the plan of a field.
There is a path across the field that
starts at B
is the same distance from BA and BC.
Using ruler and compasses, show the position of the path. [2 marks]
| Answer | Mark | Comments |
|---|---|---|
| Two arcs of equal radius or a single arc, centre B, cutting BA and BC or a single arc cutting BC with radius = BA | M1 | ± 2 mm ± 2 mm |
| Fully correct method of construction of bisector of angle ABC | A1 |
Additional guidance
| Award M1 if correct arc(s) seen alongside incorrect arc(s) | |
| Angle bisector does not need to meet AD and ignore angle bisector extended beyond AD | |
| Accept an arc touching the line BA or BC | |
| No arcs seen on BC | M0 |
 |