Land & Survey Area CalculatorLand Survey calculator allows you to choose land survey objects and helps you to calculate the lengths, angles and areas of these from a minimum of parameters. Calculate Formula And Solution: Triangle Calculator. Rectangle calculator. Convert Unit Each Others. Triangle, square, rectangle, parallelogram, rhombus, trapezoid, rectangle, polygon, circle, circle, ellipse. Sphere, cube, box, cylinder, cone, truncated cone, prism, pyramid, truncated pyramid, heoctahedron. For each shape type there are solution formulas and solutions itself based on an input data.