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An illustration showing an angle the is less than a right angle. This is an acute angle.

Acute Angle

An illustration showing an angle the is less than a right angle. This is an acute angle.

An illustration showing an angle the is greater than a right angle and less than a straight angle. This is an obtuse angle (solid curved arrow). The angle that is greater than a straight angle and less than two straight angles is called a reflex angle (dashed curved arrow).

Obtuse And Reflex Angles

An illustration showing an angle the is greater than a right angle and less than a straight angle. This…