Question

Calculati lungimea cercului cu diametrul de:10cm
AJUTATIMA VA ROG!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

$D=10cm \\\\ D=2R \\\\ 10cm=2R \ \ \ |:2 \\\\ \boxed{R=5cm} \\\\\\ L_c= 2\pi R \\\\ L_c=2*5 \pi \\\\\\ \boxed{\boxed{L_c=10\pi}}$

Answer 2

 $L_{cerc}=2\pi{R}=10\pi(cm)$