Make the given changes in the indicated examples of this section and then solve the given problems.

In Example 3, change the dimension of 45 ft to 55 ft in each figure and then find the area.

Data from Example 3

A city park is designed with lawn areas in the shape of a right triangle, a parallelogram, and a trapezoid, as shown in Fig. 2.59, with walkways between them. Find the area of each section of lawn and the total lawn area.

The total lawn area is about 7200 ft².

A = bh A = bh (72) (45)= = A3 = h(b + b) =(45) (72+35) = 2400 ft (72) (45) 1600 ft = = 3200 ft