Question

quantas diagonais tem um quadrilátero?​

Answer 1

$d = \dfrac{n \cdot(n - 3)}{2}$

$d = \dfrac{4 \cdot(4 - 3)}{2}$

$d = \dfrac{4 \cdot1}{2}$

$d = \dfrac{4}{2}$

$d = 2\: diagonais$