- Altitude of a triangle
This online calculator computes the length of a altitude of a triangle, given the lengths of edges of a triangle.

- Angle bisector of a triangle
This online calculator computes length of angle bisector given the lengths of triangle edges

- Angular size, linear size and distance
These calculators computes value of angular size or linear size or distance from the other two's

- Area of a convex quadrilateral. Example of creating a calculator.
This online calculator calculates area of a convex quadrilateral given diagonal values and value of angle between them. Article also describes the process of creating a calculator.

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

- Area of triangle by coordinates
This calculator determines area of triangle, using its vertex coordinates in cartesian coordinate system

- Ball radius calculated by volume
- Calculator of area of a triangle using Hero's formula
- Circle formulae
Circle formulae

- Circular sector
Calculates area, arc length, perimeter and center of mass of circular sector

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

- Circumcircle of a triangle
This online calculator determines the radius and area of the circumcircle of a triangle given the three sides

Calculates ellipsoid and spheroid volume and surface area.

- Cone
- Cone development
Calculator of right circular cone / truncated right circular cone development

- Counting pipes from the end face
The approach to the calculation of the number of nested circles of smaller radius at a known length of the describing circle of a larger radius. Created by user request

- Cube
- Cylindrical tank volume
Cylindrical tank volume

- Hip roof calculator
This calculator will help you estimate hip roof parameters, including rafters and roof area

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