OCR MEI Paper 2 2020 November — Question 1 2 marks

Exam BoardOCR MEI
ModulePaper 2 (Paper 2)
Year2020
SessionNovember
Marks2
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Mark schemeDownload PDF ↗
TopicSine and Cosine Rules
TypeTriangle area calculation
DifficultyModerate -0.8 This is a straightforward application of the formula for area of a triangle given two sides and the included angle: Area = ½ab sin C. Students simply substitute the given values (two sides and the angle between them) and calculate. It requires only direct recall of a standard formula with no problem-solving or multi-step reasoning.
Spec1.05c Area of triangle: using 1/2 ab sin(C)
1 Fig. 1 shows triangle \(A B C\). Fig. 1 Calculate the area of triangle \(A B C\), giving your answer correct to 3 significant figures.
Question 1:
AnswerMarks Guidance
AnswerMarks Guidance
\(\frac{1}{2} \times 22.1 \times 18.0 \times \sin133°\)M1 or \(\frac{1}{2} \times 18.0 \times 36.8 \times \sin26°\) or \(\frac{1}{2} \times 22.1 \times 36.8 \times \sin21°\)
\(145\) caoA1 ignore units; NB 172.8 or 173 unsupported implies M1 
## Question 1:

| Answer | Marks | Guidance |
|--------|-------|----------|
| $\frac{1}{2} \times 22.1 \times 18.0 \times \sin133°$ | M1 | or $\frac{1}{2} \times 18.0 \times 36.8 \times \sin26°$ or $\frac{1}{2} \times 22.1 \times 36.8 \times \sin21°$ |
| $145$ cao | A1 | ignore units; NB 172.8 or 173 unsupported implies M1 |

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1 Fig. 1 shows triangle $A B C$.

Fig. 1

Calculate the area of triangle $A B C$, giving your answer correct to 3 significant figures.

\hfill \mbox{\textit{OCR MEI Paper 2 2020 Q1 [2]}}
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