The study was conducted on two plots of land (Fig. 1) and (Fig. 2), as follows: First: measure the length of the column H: 1. The length of the column H was measured in the field (Fig. 1), it was a piece of land in the shape of an isosceles trapezoid using the tape measure, according to what was stated in Al-Khafaf (2000). Mathematically using equation (1), the results were identical, as the length of the column H is 120 meters