# Estimate the Surface Area of Lake Chad

## Work Time

# Estimate the Surface Area of Lake Chad

One method geographers use to find the area of an irregularly shaped lake is to use a grid.

The scale of the grid shown on this image of Lake Chad is each small square represents a 10 mile by 10 mile area.

- Why do you think the grid is slanted?
- Make an estimate of the area of the lake using the grid.

## Hint:

- What is the area of one square?
- If a square completely overlaps the lake, what do you know?
- If a square only partially overlaps the lake, what can you do?