Question

A circular window has a diameter of 40 centimeters. What is the circumference of the window? Use 3.14 for pi.

Answer 1

Circumference \[\large C =2\pi r\] \[\large D = 2r\] \[\large 40 \ cm = 2r\] \[\large r = 20 \ cm\] \[\large C = 2 \pi r\]\[\large C =?\]

Answer 2

\[C= \pi d\]

Answer 3

Or that...