Q. 134.4( 14 Votes )

# The sum of all in A. 135°

B. 120°

C. 156°

D. 144°

Answer :

The sum of interior angles of regular polygon is

1080° = (n – 2) × 180° [n is number of sides of polygon)]

n - 2 = 1080° / 180°

n = 6 + 2

= 8

No. of Sides = 360 / Exterior Angle

8 = 360 / Exterior Angle

So, Exterior Angle = 360 / 8

= 45°

Exterior Angle + Interior Angle = 180°

Interior Angle = 180°- 45°

^{=} 135°

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