factoring in perimeter 45 meters Calculate the perimeters of the two lawns. How does this account for the difference in time spent on each lawn? What do you think Edward should do? Parallelogram perimeter = 45 + 34 + 45 + 34 34 meters 16 meters = 158 meters 36 meters 20 meters Rectangle perimeter = 36 + 20 + 36 + 20 = 112 meters It takes longer to maintain the parallelogram lawn because the perimeter is so much greater and therefore takes longer to edge. Edward's charges need to change so that lawn perimeter is considered, too. Same shape, different perimeters Your friends ran into a similar problem back in Chapter 4 when they were picking out a venue for the rock festival--the biggest field didn't necessarily have the most perimeter. For our lawn calculations, even if we know the area of a particular lawn, we can't make any assumptions about its perimeter or how long it will take to edge the lawn. And currently, Edward's charges are only based on lawn area. Same Area Same Perimeter 250 Chapter 6