BASIC CONCEPTS OF GEOMETRY
Geometry
Acute Angle - angle with a ray separated by less than 90°.
Figure 5 Acute Angle
Obtuse Angle - angle with a ray rotated greater than 90° but less than 180°.
Figure 6 Obtuse Angle
Reflex Angle - angle with a ray rotated greater than 180°.
Figure 7 Reflex Angle
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