The booklet All About Lawns, published by Ortho Books, gives instructions for approximating the area of an irregularly shaped region. (See figure.) The booklet suggests measuring a long axis of the area, such as the vertical line in the figure. Then, every 10 feet along this axis, measure the width at right angles to the axis line. Sum these widths and multiply by 10. In the figure, for example, suppose the lengths of lines L₁, L₂, and L₃ are 34 ft, 48 ft, and 30 ft, respectively. Then Area = (34 + 48 + 30)10 = 1120 square ft. How does this method relate to the discussion in this section?

Transcribed Image Text:

L=34' L2=48′! L3=30' +