The circumference of a circle is given by the formula $\displaystyle{C}=\pi{d}\usepackage{cmbright}\Huge\$ , with $\displaystyle\pi\approx{3.14}\usepackage{cmbright}\Huge\$ . In this circle, $\displaystyle{d}={50}\usepackage{cmbright}\Huge\$ , so:

$\displaystyle{C}=\pi\cdot{50}\approx{3.14}\cdot{50}={157}\usepackage{cmbright}\Huge\$

Rounded to the nearest centimeter, the circumference of the circle is 157 centimeters.