Edexcel C12 2016 October — Question 8

Exam BoardEdexcel
ModuleC12 (Core Mathematics 1 & 2)
Year2016
SessionOctober
TopicRadians, Arc Length and Sector Area

8. \begin{figure}[h]
\includegraphics[alt={},max width=\textwidth]{53865e15-3838-4551-b507-fe49549b87db-20_545_1048_212_584} \captionsetup{labelformat=empty} \caption{Figure 1}
\end{figure} The compound shape \(A B C D A\), shown in Figure 1, consists of a triangle \(A B D\) joined along its edge \(B D\) to a sector \(D B C\) of a circle with centre \(B\) and radius 6 cm . The points \(A , B\) and \(C\) lie on a straight line with \(A B = 5 \mathrm {~cm}\) and \(B C = 6 \mathrm {~cm}\). Angle \(D A B = 1.1\) radians.
  1. Show that angle \(A B D = 1.20\) radians to 3 significant figures.
  2. Find the area of the compound shape, giving your answer to 3 significant figures.