Question

por favor me ajudemmmm​

Answer 1

Vamos là.

1)

y² = 20²+ 21²

y² = 400 + 441 = 841

y = 29

41² = 40² + x²

1681 = 1600 + x²

x² = 1681 - 1600 = 81

x = 9

x + y = 29 + 9 = 38 (D)

2)

a) 90 = π/2

b) 45 = π/4

c) 120 = 2π/3

d) 210 = 7π/6

3)

a) 5π/6 = 150°

b) 3π/4 = 135°

c) 9π/4 = 405°