Data: For the Hedco building: The bricks are 29.5 cm (0.295 m) wide and 5.5 cm (0.055 m) high The grout on the sides is 1.2 cm (0.012 m) wide The grout over and under the bricks is 1.2 cm (0.012 m) high The building is 100m from the observation site For the Parking Structure A: The bricks are 39 cm (0.39 m) wide and 9 cm (0.09 m) high The grout on the sides is 1.5cm (0.015 m) wide The grout over and under the bricks is 1.5 cm (0.015 m) high The building is 69 m from the observation site All measures are approximate. With the size of the bricks known, as well as the width of the grout lines, the true length of the wall segment observed can be calculated. Figure out how to do this, then calculate the length (or height) of the stretch of wall that is visible in the eyepiece. To increase accuracy, count the bricks in vertical direction only