Question

calcule as diagonais do poliguinos de: a)68 lados

Answer 1

$D=\frac{n(n-3)}{2}\\\\D=\frac{68(68-3)}{2}\\\\D=\frac{68\cdot65}{2}\\\\D=\frac{4420}{2}\\\\D=2210$


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Bons estudos! :)