Exercise 2 Page 771

Before we can find the circumference of the circle, notice that its diameter is equal to the length of the circumscribed polygon, which is a square.

Knowing that the diameter is

32,

we can substitute it in the formula for the circumference of a circle and simplify.

C = π d

$d = 32$

C = π (32)

C = 32 π

Use a calculator

C = 100.530964

Round to $2$ decimal place(s)

C \approx 100.53

The circumference of the circle is

32 π

units or about

100.53

units.