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When two arms of an angle lie in the opposite direction, ... (0-360 degrees - pictured right) . They often have two sets of numbers going into opposite directions: 0° to 180° and 180° to 0°.
When two arms of an angle lie in the opposite direction, ... (0-360 degrees - pictured right) . They often have two sets of numbers going into opposite directions: 0° to 180° and 180° to 0°.
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