Question

Determinați raza unui cerc care are lungimea egală cu:
a) 18π cm;
b) 16√2π cm;
c) 4π√6;
d) 9π cm​

Answer 1

lungimea cercului= 2πR

a) 2πR=18π => 2R=18 => R=9

b) 2πR=16√2π => 2R=16√2 => R=8√2

c) 2πR=4π√6 => 2R=4√6 => R=2√6

d) 2πR=9π => 2R=9 => R=9/2