### Home > MC2 > Chapter 10 > Lesson 10.2.4 > Problem10-119

10-119.

Sketch a circle with a radius of $4$ cm. Find the area and circumference of the circle.

$A = r^2π$
$C = 2πr$

Substitute $4$ for $r$ in each equation.

$A = 16π = 50.27$ cm$^{2}$
What is the circumference?