Question

calcule o valor de x de cada triângulo .

Answer 1

cos 45 = √2 / 2
3,8 / h = √2 / 2
√2h = 3,8 . 2
√2h = 7,6
h = 7,6 /√2
h = 3,8√2

x² = h² - (3,8)²
x² = (3,8√2)² - (3,8)²
x² = 28,88 - 14,44
x² = 14,44
x = √ 14,44
x = 3,8