Question

calcular o valor do x nos triângulos retângulos:​

Answer 1

Resposta:

a) x = 12

b) x = 3/5

c) x = 16/5 = 3,2

d) x = 15

Explicação passo-a-passo:

a)

9/x = x/16

9 × 16 = x.x

x² = 9.16 = 3².4²

x = √(3².4²) = 3.4 = 12

x = 12

b)

x/3 = 3/15

x/3 = 1/5

x = 3/5

c)

x/4 = 4/5

x = 4.4/5 = 16/5 = 3,2

d)

20² = 12² + a²

a² = 20² - 12² = 400 - 144 = 256

a = √256 = 16

12/x = 16/20

12/x = 4/5

12 × 5 = 4.x

4x = 12 × 5

x = 12 × 5/4 = 3 × 5 = 15

x = 15