Acute angles - less than 90°, Obtuse angle - more than 90° but less than 180°, Right angle - equal to 90°, Reflex angle - more than 270° but less than 360°, Angle on a straight line - equal to 180°, Angles in a triangle - add up to 180°, An isosceles triangle - has 2 sides of equal length, Angles of a quadrilateral - will add up to 360°,

Angles

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