- Area de la Sombra de un Objeto
El área de la sombra se refiere a la de un objeto cuadrado o rectangular.

- Area of a quadrilateral
This article lists several calculators for area of a quadrilateral

- Circular segment
Can calculate area, arc length,chord length, height and perimeter of circular segment by radius and angle.

- Course angles and distance between the two point on the orthodrome(great circle)
Calculates the distance between two point of the Earth specified geodesic (geographical) coordinates along the shortest path - the great circle (orthodrome). Calculates the initial and final course angles and azimuth at intermediate points between the two given.

- Degrees-minutes-seconds to decimal degrees conversion and vice versa.
This online calculator converts the value of an angle given in the form of the degrees-minutes-seconds to degrees, expressed in decimal fraction and back from decimal fraction to degrees-minutes-seconds.

Calculation of azimuth and solar elevation angle by given the coordinates and time of observation. It's possible to input coordinates manually or by selecting from the directory of cities.

- Lengths of triangle sides given one side and two angles
This online calculator determines lengths of triangle sides given one side and two angles

- Pipe cold bending. Flexure depth with main shaft.
Calculates the section flexure depth with pipe bender or bending machine to obtain given parameters.

- Plane angles measurement systems
- Projection
Calculation of unknown parameters of projection using known parameters. Parameters are duration, maximum height, distance, initial velocity and angle.

- Sun position at a given date. Azimuth and elevation table.
Calculation of azimuth and elevation of the sun above the horizon for a given position and time. Table with one hour increments.

- The diagonals of a parallelogram
Calculator computes the diagonals of a parallelogram and adjancent angles from side lengths and angle.

- Triangle angles for given triangle sides
This calculator computes triangle angles for given triangle sides using cosine law