Difficulty: Easy
Correct Answer: south-west
Explanation:
Introduction / Context:
This item checks cumulative turn tracking. You must add clockwise rotations and subtract anti-clockwise rotations, then map the resulting angle to a compass direction.
Given Data / Assumptions:
Concept / Approach:
Convert the initial facing to an angle, accumulate signed turns, reduce modulo 360°, and interpret the quadrant.
Step-by-Step Solution:
West corresponds to 180°.After +45°: 180° + 45° = 225°.After +180°: 225° + 180° = 405° → 405° − 360° = 45°.After −270°: 45° − 270° = −225° → add 360° → 135°.135° lies between South (90°) and West (180°): that is South-West.
Verification / Alternative check:
Combine the turns first: total rotation = +45° + 180° − 270° = −45°. From West (180°), −45° gives 135°, i.e., South-West. Same result.
Why Other Options Are Wrong:
Common Pitfalls:
Forgetting to wrap angles within 0°–360° or mixing the sign of anti-clockwise rotation.
Final Answer:
south-west
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