Question

Cine stie urgent!!!!!!​

Answer 1

Răspuns:

Explicație pas cu pas:

8a)

l1=12,5 cm

l2=10,5 cm

P=4l

P1=4l1  si P2=4l2

P1/P2=l1/l2=12,5/10,5=125/105=25/21=R

A=l²

A1/A2=l1²/l2²=R²=625/441

b)l1=6/5cm l2=18/5cm         R=l1/l2=6/5×5/18=1/3

P1/P2=R=1/3

A1/A2=R²=1/9

9 daca R=L1/L2=7/2     ⇒P1/P2=R=7/2

A1/A2=R²=49/4