how do you find the area of an odd shape, i have to find the area of a lake for home work?

Question

it just shows a picture of a lake, and says ever 1cm = 10 miles

Answer 1

hi .. draw a grid, and count the number of whole squares, and estimate the bits of squares. your scale will dictate how big each square is.

Answer 2

if the lake is circular you can estimate the area as that of a circle
area=(pi)(diameter/2)^2
the diameter is the distance across lake and pi is approximately 3.14