Complete the table using function notation to show the relationship between one term and the next.
figure number, n
process
perimeter, f(n)
wn
f(2)= 3 + 1 = f( ) +
f(3) = + = f( ) +
f(4) = + = f( ) +
f(5) = + = f( ) +

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?