What is the measure of (i) each exterior angle of a regular pentagon? (ii) each interior angle of a regular pentagon?
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The measure of each exterior angle of a regular polygon =
360/n.
⇒ The measure of each exterior angle of a regular pentagon = 360 /5
n =72
interior angles pentagon
A pentagon has 5 sides, and can be made from three triangles, so you know what ...
... its interior angles add up to 3 × 180° = 540°
And when it is regular (all angles the same), then each angle is 540° / 5 = 108°
The Interior Angles of a Pentagon add up to 540°
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