angle is the
space (usually measured in degrees) between two intersecting lines or surfaces
at or close to the point where they meet.
types of angle :
Ø Right angles
are 90°.
Ø Acute angles
are less than 90°.
Ø Obtuse angles
are more than 90° but less than 180°.
Ø Reflex angles
are more than 180°.
Ø Straight angles
are measured at 180°
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