Bonjour;
Figure 1
r= 5cm
gd 1/2 cercle
3,14*5 => 15,7cm
petits demis cercles = 1 cercle
r = 2,5
2 * 3,14*2,5
=>17,7
total
15,7+15,7 => 31,4cm
2° figure
2 demis cercles = 1 cercle
r=3cm
2*3,14*3
=> 18,84cm
total:
18,84+6+6
=> 30,84 cm
C'est la 1° figure
