How to do the eighth question on page 87 of the fifth grade people's education edition math book?
Solution: The area of a triangle with a height of 22.5m is 540=(22.5*x)/2, and the solution is that the area of a triangle with a height of 18m is 540=( 18*x)/2, and x = 48m, that is, two adjacent sides of a parallelogram are 60m and 48m respectively.