Question

o dodecágono é um polígono que tem 12 lados Calcule o número de diagonais desse polígono me ajudaaaa pfvrrr​

Answer 1

Resposta:

d=54

Explicação passo-a-passo:

d=n (n-3)/2

d=12(12-3)/2

d/12.9/2=54

Answer 2

$\Large\displaystyle\begin{gathered} \tt d=\frac{n\cdot(n-3)}{2}\end{gathered}$

$\Large\displaystyle\begin{gathered} \tt d=\frac{12\cdot(12-3)}{2}\end{gathered}$

$\Large\displaystyle\begin{gathered} \tt d=\frac{12\cdot9}{2}\end{gathered}$

$\Large\displaystyle\begin{gathered} \tt d=\frac{108}{2}\end{gathered}$

$\Large\displaystyle\text{ \begin{gathered} \boxed{\red{\tt d=54}} \end{gathered} }$