Question

Un cerc are lungimea egala cu 20pi cm. Diametrul acestui cerc este egal cu... cm.
Va rog urgent! Multumesc anticipat!

Answer 1

$Lc=2\pi R \\ Lc=20 \pi \\\\\\ \not 2 \not \pi R= \not 20 \not \pi \\\\ \boxed{R=10} \\\\ D=2R \\\\ D=2*10 \\\\ \boxed{\boxed{D=20}}$