Question

calcule o valor de x e y nos triângulos retângulos

Answer 1

Sen 30° = y/6
1/2 = y/6
2y = 6
y = 6/2
y = 3

Sen 30° = x/10
1/2 = x/10
2x = 10
x = 10/2
x = 5

Alternativa (a).