Question

3. Calcule o valor do ângulo A.
A
5x
3x - 15°
C с
2x + 5°
A
a) 78°
O b) 82°
O c) 85°
d) 90°
e) 950​

Answer 1

Resposta:

ITEM (E)

Explicação passo-a-passo:

$\blue {{ _{\heartsuit} } \heartsuit_{\heartsuit} } \: \: \mathsf {OI, TUDO \: \: J\acute{O}IA \: ? \: \:\blue {{ _{\heartsuit} } \heartsuit_{\heartsuit} } }$

$\mathtt{5x + 2x + 5 + 3x - 15 = 180} \\ \mathtt{7x + 5 + 3x - 15 = 180} \\ \mathtt{10x + 5 - 15 = 180} \\ \mathtt{10x - 10 = 180} \\\mathtt{10x = 180 + 10} \\ \mathtt{10x = 190} \\ \mathtt{x = \frac{190}{10} } \\ \mathtt{x = 19} \\ \\ \mathtt{a = 5(19)} \\ \red {\mathtt{a = 95}}$

$\mathcal{ATT : ARMANDO}$