Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 3 - No. 22)
If a boat travels 5km on a bearing of 060 degrees and then 7km on a bearing of 150 degrees, what geometrical shape describes the boat's path?
A straight line
An acute angle
An obtuse angle
A right angle
説明
The path forms an obtuse angle, as the difference in bearings is greater than 90 degrees.