Test Index

BECE Mathematics 2015 Paper

Question : 32

Total: 40

Solution:

Concept:

Turning anti-clockwise from west to north follows the longer path around the compass.

Explanation:

The direct angle between west and north is

90^{\circ}

But anti-clockwise from west means moving west

\to

south

\to

east

\to

north.

This requires three quarter-turns.

Each quarter-turn is

90^{\circ}

So the total turn is

90^{\circ} + 90^{\circ} + 90^{\circ} = 270^{\circ}

Answer:

270^{\circ}

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