1.

किसी बहुभुज का अन्तः कोण उसके बाहय कोण का 5 गुना है। बहुभुज की भुजाये ज्ञात करे?A. 14B. 16C. 12D. 18

Answer» Correct Answer - C
According to question sum of interior angles
As we know that
Exterior angle + interior angle =`180^(@)`
Exterior angle +5 exterior angle =`180^(@)`
6 Exterior angle =`180^(@)`
Exterior angle = `30^(@)`
`therefore` No. of sides = `(360^(@))/("External angle")`
`=(360^(@))/(30^(@)) = 12`


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