Angles
An angle measures the amount of turn
Names of Angles
As the Angle Increases, the Name Changes:

Type of Angle Description
Acute Angle an angle that is less than 90°
Right Angle an angle that is 90° exactly
Obtuse Angle an angle that is greater than 90° but
less than 180°
Straight Angle an angle that is 180° exactly
Reflex Angle an angle that is greater than 180°
An angle measures the amount of turn
Names of Angles
As the Angle Increases, the Name Changes:

Type of Angle Description
Acute Angle an angle that is less than 90°
Right Angle an angle that is 90° exactly
Obtuse Angle an angle that is greater than 90° but
less than 180°
Straight Angle an angle that is 180° exactly
Reflex Angle an angle that is greater than 180°
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