Angles like 0°, 30°, 45°, 60°, 90°, 120° and 180° are called ………………. angles.
Angles like 0°, 30°, 45°, 60°, 90°, 120° and 180° are called ………………. angles.
A) Dependant
B) Standard
C) Equal
D) Perpendicular
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