Калькулятор Диагонали

Foundation Diagonal Calculator

A simple and elegant app for calculating the foundation diagonal and the area of ​​a right triangle. Enter two known values ​​and get an instant, accurate result with clear visualization. Ideal for students, engineers, builders, and anyone who appreciates the precision and beauty of mathematics!

✨ Key features:

• Instant calculation — diagonals, area of ​​a triangle, and area of ​​the entire rectangle


• Interactive visualization — animated triangle with labels for sides and diagonals


• Automatic rectangle completion — dotted lines for better understanding of geometry


• Support for light and dark themes — comfortable at any time of day


• Free and no hidden fees — only unobtrusive advertising to support development

Based on the classic Pythagorean theorem:
d = √(a²) + b²)

Created with love for those who learn, design, and build the future! 📐✨