verify Euler's relation for a right prism having each of the bases a polygon of n-sides
Kindly refer the similar link for your query.
https://www.meritnation.com/ask-answer/question/verify-eulers-formula-for-cuboid-prism-of-pentagon-base-py/mensuration/1598421
https://www.meritnation.com/ask-answer/question/verify-euler-s-formula-for-a-pentagonal-pyramid/visualising-solid-shapes/1186607
Regards
https://www.meritnation.com/ask-answer/question/verify-eulers-formula-for-cuboid-prism-of-pentagon-base-py/mensuration/1598421
https://www.meritnation.com/ask-answer/question/verify-euler-s-formula-for-a-pentagonal-pyramid/visualising-solid-shapes/1186607
Regards