The area of a rectangle is given by the formula Area = length * width. Here, Area = 8 * 3 = 24.

The area A of a trapezoid is given by A = 0.5 * (base1 + base2) * height. Here, A = 0.5 * (10 + 6) * 4 = 0.5 * 16 * 4 = 32.

The perimeter P of a square is given by the formula: P = 4 * side length. Here, P = 4 * 7 = 28.

The perimeter P of a triangle is the sum of the lengths of its sides. Here, P = 5 + 12 + 13 = 30.

The slope m of a line through two points (x1, y1) and (x2, y2) is given by m = (y2 - y1) / (x2 - x1). Here, m = (11 - 3) / (5 - 2) = 8 / 3.