Question

what is the sum of all interior angles of a nanogon​

Answer 1

Answer:

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Answer 2

Step-by-step explanation:

A=9/4a^2 cot(180degrees/9).

In geometery, a nanogon or enneagon is a nine-sided face.The name nonagon is a prefix hybrid formation, from Latin, used equivalently, attested already in the 16th century in French nonogone and in English from the 17th century.