A = [2, -3, 0]
B = [2, 2, 0]
C = [-1, 2, 0]
E = [2, -3, 5]
AB = B - A = [2, 2, 0] - [2, -3, 0] = [0, 5, 0]
BC = C - B = [-1, 2, 0] - [2, 2, 0] = [-3, 0, 0]
AE = E - A = [2, -3, 5] - [2, -3, 0] = [0, 0, 5]
D = A + BC = [2, -3, 0] + [-3, 0, 0] = [-1, -3, 0]
F = B + AE = [2, 2, 0] + [0, 0, 5] = [2, 2, 5]
G = C + AE = [-1, 2, 0] + [0, 0, 5] = [-1, 2, 5]
H = D + AE = [-1, -3, 0] + [0, 0, 5] = [-1, -3, 5]
AG = G - A = [-1, 2, 5] - [2, -3, 0] = [-3, 5, 5]
|AG| = |[-3, 5, 5]| = √(3^2 + 5^2 + 5^2) = √59 = 7.681 LE