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A regular polygon has one of its interior angles as 144°. a) Name the polygon. b) Find the number of sides. c) Find the sum of its interior angles.

Mathematics

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** (Left Column): A regular polygon has one of its interior angles as 144°.**

a) Name the polygon.

  1. Find the exterior angle.

    The sum of an interior angle and its corresponding exterior angle is 180∘180^\circ.

    Exterior Angle=180∘−Interior Angle\text{Exterior Angle} = 180^\circ - \text{Interior Angle} Exterior Angle=180∘−144∘=36∘\text{Exterior Angle} = 180^\circ - 144^\circ = 36^\circ
  2. Find the number of sides (nn).

    For any regular polygon, the sum of its exterior angles is 360∘360^\circ. Therefore, each exterior angle is $\

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