Răspunsuri

2014-05-07T15:49:30+03:00
Lungimea cercului este 2 pi r

a) diam=10 cm=> r=5

lung cerc=2*5 pi
lung cerc=10 pi

b) 6 intr si 2/5=6*5+2/5=32/5

lung cerc= 2*32/5 pi
lung cerc=64/5 pi
4 4 4
2014-05-07T15:51:37+03:00
A).L=2 \pi R=2 \pi ·5=10 \pi .
b).L=2 \pi R=2·6 2/5 \pi
2·32/5 \pi =64/5 \pi
3 4 3