Question

A aria de triângulo cujos vertices são (1, 2), (3, 4), e(4, -1), e igual a:

Answer 1

Resposta:

A =6u² (6 unidades quadradas de área)

Explicação passo a passo:

$A= \frac{1}{2} \left|\begin{array}{cccc}1&3&4&1\\2&4&-1&2\end{array}\right|_{+}^{-}\\\\A=\frac{1}{2}|1.4+3.(-1)+4.2-2.3-4.4-(-1).1|\\\\A=\frac{1}{2}|4-3+8-6-16+1|$

$A=\frac{1}{2}|13-25|\\\\A=\frac{1}{2}|-12|\\\\A=\frac{1}{2}*12\\\\ A=6$

Answer 2

Explicação passo-a-passo:

1. kdkdjdjdjskdkdkdkzksisis
2. sdndnxndndndkxkdkdkd
3. sjdjdkddkdjdj
4. skdkdkd