O-LevelMathematicsCoordinate geometry4024/22 · Oct/Nov 2015 · Q28 Marks
A is the point (8, 7), B is the point (–2, 11) and C is the point (1, 7).
- (a)Calculate the area of triangle ABC.[2]
- (b)Calculate the length of AB.[2]
- (c)Calculate the perimeter of triangle ABC.[2]
- (d)Calculate BẬC.[2]
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2015). The mark or mark type is shown in brackets.
- [2] M1 for 1/2 × CA × (11–7) oe or SC 1 for 28
- 14
- [2] M1 for √(8-(-2))² + (7-11)²
- 10.8
- [2ft] B1 for [BC =] 5 soi or M1 for (b) + theirBC + CA
- 22.8
- [2ft] M1 for tanA = (11-7) / (8-(-2)) oe
- 21.8
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