# Take a regular hexagon Fig 3.10.Q4. Repeat this activity for the cases of    (ii) a regular 20-gon

(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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