The following interactive smartphone app shows how the center of gravity of a triangle is calculated using geometry. The vertices of the triangle can be moved interactively with your mouse (or your finger on a touchscreen). Title Center of gravity of a triangle Target audience Self-learners Platforms Internet browser Features Full screen modelossless magnificationLarge screens […]

# Mathematics

## Inner circle of a triangle (App)

The following interactive smartphone app shows how the inner circle of a triangle is calculated using geometry. The vertices of the triangle can be moved interactively with the mouse (or the finger on a touchscreen). Title Inner circle of a triangle Target audience Self-learners Platforms Internet browser Features Full screen modelossless magnificationLarge screens supported License […]

## Circumcircle of a triangle (App)

The following interactive smartphone app shows how the perimeter of a triangle is calculated using geometry. The vertices of the triangle can be adjusted. The app has been specifically designed for mobile phones and tablets. The layout of the app adopts to the format of the device. The app can also be used on a […]

## Fundamentals of integral calculus

The animation shows how an integral can be approximated by establishing upper and lower sums. The shape of the curve can be modified by moving the gray circles on either side. To display the master function, click the content area. The values in the upper area in the table are adjustable. The number of subdivisions […]

## Pythagorean theorem

In the interactive animation, the squares formed by the cathets and the hypothenuse of a right-angled triangle are displayed. The point A of the triangle can be moved interactively along the circumference. All drawn squares adjust continuously in real time. Title Pythagorean theorem Target audience Teachers and lecturers Platforms Microsoft® Windows®Apple® Macintosh® Features Full screen […]

## Differential and integral calculus

The animation illustrates the mathematical relationship between a derivation function and a master function. The curve in the upper right area defines the position of the object. The shape of the curve can be changed with the mouse. The first derivation function refers to the speed, the second to the acceleration. Both derivation functions adapt […]

## Geometric relations at the triangle

The interactive animation shows the essential geometric relations at a triangle. The corner points of the triangle can be moved interactively with the mouse. All drawn elements adapt continuously in real time. Title Geometric relations at the triangle Target audience Teachers and lecturers Platforms Microsoft® Windows®Apple® Macintosh® Features Full screen modeLossless magnificationLarge screens supported Licence […]