Right Triangle Calculator

Fantazey App

Contains adsIn-app purchases

About this app

Instant special right triangle calculator for 30-60-90 and 45-45-90 triangles.
Enter just one side — get all sides, area and perimeter immediately.
Works offline. No formulas needed.

This right triangle calculator supports both special right triangles:
- 30 60 90 Triangle Calculator
- 45 45 90 Triangle Calculator — also known as isosceles right triangle calculator

Key Features:
- Instant auto-calculations — results appear as you type
- Right triangle solver: find any missing side of triangle
- Area of triangle calculator — area and perimeter in one tap
- Clear visual of the triangle with labeled angles and sides
- Calculation history — save and share your results
- Dark and Light themes
- Multi-language: English, Русский and more
- Works offline — no internet required

Perfect for:
- Students studying geometry, trigonometry and special right triangles
- Teachers demonstrating 30 60 90 and 45 45 90 triangle properties
- Engineers, architects, carpenters, builders and DIY enthusiasts
- Anyone needing a right angle triangle calculator on the go

Whether you need a triangle calculator, right triangle calculator,
30 60 90 triangle calculator, 45 45 90 triangle calculator,
special right triangle calculator, isosceles triangle calculator,
area of a triangle calculator or a tool to find the missing side
of a triangle — this app solves it instantly.

Download now. Get accurate results in seconds!
We appreciate your feedback and suggestions.

What’s new

- Updated to Android 16 (API 36) for improved performance and compatibility
- SDK updates for stability and security improvements