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Definition--Angle Concepts--Straight Angle This is a collection of definitions related to angles and related concepts. This includes general definitions for angles, angle measures, and angle properties, as well as specific angle types. Relationships among different types of angles are also defined.
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Give two examples each of right, acute, and obtuse angles from your environment.
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Table 2 from Fostering Students' Development of the Concept of Angles Using Technology.
Definition--Angle Concepts--Straight Angle
Angle – Definition and Types with Examples