Foundation November 2020 Paper 1 Q23
23 ABCD is a quadrilateral.
(a) Construct the bisector of angle ABC.
Show all your construction lines. [2]
Show all your construction lines. [2]
(b) Construct the perpendicular bisector of BC.
Show all your construction lines. [2]
Show all your construction lines. [2]
(c) Shade the region which is
- nearer to BC than to AB
and
- nearer to B than to C.
[1]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| Accurate ruled angle B bisector with two pairs of correct arcs | 2 | B1 for accurate ruled angle B bisector | Tolerance \(\pm 2^\circ\) e.g. one angle \(49^\circ\) to \(53^\circ\) and the line can be any length, must touch B and condone dotted line |
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| Accurate ruled perpendicular bisector of BC with two pairs of correct arcs | 2 | B1 for accurate ruled perpendicular bisector of BC | Tolerance \(\pm 2^\circ\) e.g. angle \(88^\circ\) to \(92^\circ\) and \(\pm\) 2mm e.g. 27mm to 31 mm and line can be any length, must touch BC and condone dotted line |
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| Correct region shaded | 1 dep | dep on at least B1 and B1 and both bisectors intersecting | |