Question

Exercitiile 2,3 va rog urgent!!!!!

Answer 1

Răspuns:

Explicație pas cu pas:

2. A disc =πr²

a . 25π cm

b. 12π cm

c. 1,44π cm

d. 9/2π cm

3. Lcerc = 2πr

a. 10π = 2πr ⇒ r= 10π/2π = 5 cm

b. 8π√2= 2πr⇒ r=8π√2/2π = 4√2 cm

c. 2π√5 =2πr⇒ r=2π√5/2π =√5 cm

d. 5π =2πr⇒ r= 5π/2π= 5/2 cm