Q6 F of 59 Page 195

Let’s write then measurement of each interior and exterior angle of the following regular polygon.

Polygon with 18 sides.


Now for a polygon, with 18 sides let us substitute n = 18 in the formula.

Sum of interior angles is given as = (2 × 18 – 4) × 90


= (36 – 4) × 90


= 32 × 90


= 2880°


Measure of each interior angle = Sum of all Interior Angles / n


= 2880 / 18


= 160°


Sum of all exterior angles in a regular of n sides is always 360°.


Measure of each exterior angles = 360 / 18
= 20°


More from this chapter

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6 D

Let’s write then measurement of each interior and exterior angle of the following regular polygon.

Nonagon


 6

Let’s write then measurement of each interior and exterior angle of the following regular polygon.

Decagon


 7

let’s find whether the following measurement are possible or not for exterior angle of a regular polygon- (write yes/no):

6°


 7

let’s find whether the following measurement are possible or not for exterior angle of a regular polygon- (write yes/no):

10°