Higher November 2019 Paper 3 Q7
7 An equilateral triangle has side length 16 metres.
Using ruler and compasses only, construct a scale drawing of the triangle.
Use the scale 1 centimetre represents 2 metres. [3 marks]
Scale: 1 cm represents 2 m
| Answer | Mark | Comments |
|---|---|---|
| Side of length [7.8, 8.2] cm drawn | B1 | |
| Correct construction with intersecting arcs, same radius as their base ± 2 mm to identify the third vertex or correct construction with intersecting arcs, equal radii ± 2 mm, line drawn at 60° and third vertex correctly positioned or correct construction with intersecting arcs, equal radii ± 2 mm and construction arc drawn to correctly identify the third vertex | M1 |  or  or  |
| Triangle with equal sides [7.8, 8.2], with correct construction seen | A1ft | ft B0M1 triangle with equal sides ± 2 mm, with correct construction seen |
Additional guidance
No construction arcs drawn can score a maximum of B1