Question

Determinați lungimea unui cerc având raza egală cu:
a) 6cm;
b) 3√2 cm;
c) 4,5cm;
d) 3√6/2 cm.​

Answer 1

L = 2πR

a) R = 6 cm

L = 2π × 6 = 12π cm

b) R = 3√2 cm

L = 2π × 3√2 = 6√2π cm

c) R = 4,5 cm

L = 2π × 4,5 = 9π cm

d) R = 3√6/2

L = 2π × 3√6/2 = 3√6π

Answer 2

Raza=6=> Lcerc= 12 pi
Raza=3 radical 2 => Lcerc= 6 radical 2 pi
Raza =4,5=> Lcerc= 9 pi
Raza 3 radical 2 / (supra) 2 => Lcerc = 3 radical 2 pi