(a)[5]
Show that angle $ACB$ is $95.1^{\circ}$, correct to $1$ decimal place.
(b)[6]
Calculate the car’s average speed for this journey. Give your answer in kilometres per hour.
Mathematics 0580 · IGCSE · Non-right-angled triangles
Non-right-angled triangles — practice question
The diagram illustrates the straight roads linking town $A$, town $B$ and town $C$. $AC = 60\text{ km}$, $CB = 87\text{ km}$ and $B$ lies due east of $A$. The bearing of $C$ measured from $A$ is $038^{\circ}$.