Properties of polygons : For a polygon of n sides,
(i) Sum of interior angles = (2n – 4) × 90°
(ii) Sum of exterior angles= 360° (always)
(iii) Each interior angle = \(\frac{(2n-4)}{n}\) x 90° (regular polygon).
(iv) Each exterior angle \(\frac{360°}{n}\) (in regular polygon)
(v) Interior angle + exterior angle = 180° (always)
