Take a regular hexagon Fig 3.10.

Q4. Repeat this activity for the cases of

    (ii) a regular 20-gon

 

Answers (1)

(ii) a regular 20-gon: It has all 20 angles equal and sum of all eight angles is 3240.Interior angles are equal so exterior angles are also equal.

Let interior angle be A.

20\ast A= 3240\degree

A= 162\degree.

All exterior angles be B.

B=180\degree - 162\degree

B=18\degree

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