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Câu 24:

Cho đa giác đều n đỉnh, $n \in \mathbb{N}$

Câu 24: Cho đa giác đều n đỉnh, n∈Nn \in \mathbb{N}n∈N và n≥3n \ge 3n≥3. Tìm n biết rằng đa giác đã cho có 135 đường chéo:

Thông tin câu hỏi

Câu 24:

Cho đa giác đều n đỉnh, $n \in \mathbb{N}$ và $n \ge 3$ . Tìm n biết rằng đa giác đã cho có 135 đường chéo: