Sine and cosine rules and area of a triangleEdexcel International A Level Maths: Mind map

Exam questions on Sine and cosine rules and area of a triangle

1. In triangle $PQR$, $PQ=12$ cm, $PR=9$ cm and angle $QPR=40^{\circ}$.
   Find the size of angle $PQR$.2 marks
2. A triangular plot of land $ABC$ has $AB=140$ m, $AC=95$ m and $BC=180$ m.
   Find the size of the smallest angle of the plot.2 marks
3. In triangle $ABC$, $AB=8.4$ cm, angle $ABC=52^{\circ}$ and angle $ACB=71^{\circ}$.
   Find the length of $AC$.3 marks