Question

Qual a area de um triângulo de altura 3cm e de base medindo 4cm?

Answer 1

3 vezes 4 = 12
12 dividido por 2 = 6

Answer 2

$\large\boxed{\begin{array}{l}\sf A=\dfrac{1}{2}\cdot B\cdot h\\\\\sf A=\dfrac{1}{2}\cdot4\cdot3\\\sf A=2\cdot3\\\sf A=6\,cm^2\end{array}}$