Предмет: Геометрия, автор: ivan6316488

знайти кількість діагоналей 18-кутнтка що виходять з однієї вершини​

Ответы

Автор ответа: Аноним
1

18-3=15

Ответ 15 диагоналей. т.к. две соседние с этой вершиной образуют две стороны.

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