# Calculation of the inner circle of a triangle

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).

Start App

The app has been specifically designed for mobile devises. The layout of the app will adapt to the appropriate format. The app can also be used on a regular PC or Mac.

Title: | Calculation of the inner circle of a triangle |

Target group: | Students |

Level: | easy |

Platforms (primary): | Smartphones, tablets and PCs |

Online/Offline: | Internet connection is required. |

## Further animations for smartphones/tablets

Calculation of the outer circle of a triangle

Calculation of the center of gravity on a triangle

Geometric relationships on a square

Basic principles of differential and integral calculus

## Further animations for PCs

Geometric relations on the triangle

Basic principles of differential and integral calculus

Pythagorean theorem

Sine and cosine theorem

Fundamentals of the integral calculus

## Sources

- Authoring tool: Adobe Animate
- JavaScript library: CreateJS

## Feedback

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