(a)[3]
Show that $\angle CAB = 62.2^\circ$, accurate to 1 decimal place.
(b)[2]
Find the bearing of $A$ from $C$.
(c)[4]
The yacht travels from $A$ to $B$ to $C$ and back to $A$. Calculate the total length of the route.
Mathematics 4024 · O Level · Non-right-angled triangles
Non-right-angled triangles — practice question
A yacht travels around the triangular path shown. The bearing of $B$ from $A$ is $135^\circ$. $BC = 3.7\text{ km}$, $AC = 2.8\text{ km}$ and $\angle ABC = 42^\circ$.