Mathematics, 23.05.2020 21:04, samarkanduzbek

For the regular nonagon shown, which (if any) of the following equalities are incorrect?
The image is of a regular nonagon. Two triangular sectors from the center are shown. One of them is divided into two equal parts marked as 1 and 2. The second sector is marked as 3.

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For the regular nonagon shown, which (if any) of the following equalities are incorrect?
The i...