Katrina's backyard garden is an irregular polygon.
She wants to buy turf to cover the whole area.
Find the area of each section of the garden.
Then find the area of the whole garden.
To find the area of each section of the garden, you would need to divide the irregular polygon into smaller regular shapes, such as triangles or rectangles. Then you can calculate the area of each shape using the appropriate formula (e.g., area of a triangle = 1/2 * base * height, area of a rectangle = length * width).
Once you have calculated the area of each section, you can add them all together to find the area of the entire garden.