Right angle - 90°, Acute angle - Less than 90°, Obtuse angle - More than 90°, Parallel lines - Lines that do not intersect each other, Perpendicular line - when two lines form an angle of 90° , In angle ABC - AB and BC are arms of an angle, 145° - Obtuse angle, 90° - Right angle, 85° - Acute angle,

Maths angles

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