Triangle Calculator Pythagoras
Hypotenuse & Right Triangle
Free · In‑App Purchases · Designed for iPad
Solve any right triangle from two values – and any other triangle from three.
RIGHT TRIANGLES (FREE)
Enter any two of: leg a, leg b, hypotenuse c, angle α or angle β (at least one side). Triangle Calculator finds every missing side and angle, plus the area, perimeter and height to the hypotenuse, using the Pythagorean theorem and sine, cosine and tangent. Swap the legs with one tap; a check confirms α + β = 90°.
ANY TRIANGLE
Enter any three values – sides a, b, c and angles A, B, C – and solve SSS, SAS, ASA, AAS and the ambiguous SSA case. Every missing side and angle and the triangle type (acute, right, obtuse; equilateral, isosceles, scalene) are free. Pro adds area, perimeter, all three heights, inradius, circumradius and the second SSA solution.
VALUES ON THE DRAWING
The triangle is redrawn to the true proportions of your answer, with every value written right on it. Prefer a list? Switch to the Classic layout in Settings.
SEE HOW IT'S SOLVED
Each result comes with its formula and your numbers, for example c = √(3² + 4²) = 5.
DEGREES, MINUTES, SECONDS (PRO)
Type and read angles like 36°52′12″ – for plans, surveying and job-site work.
CLEAR, HONEST ANSWERS
The app tells you when values can't form a triangle – a hypotenuse shorter than a leg, sides that break the triangle inequality, or angles that add up to too much – instead of returning a wrong number.
FORMULA LIBRARY & HISTORY
A searchable library of right-triangle and any-triangle formulas with worked examples, and a history of your calculations to reopen any time (free keeps your last 5).
EVERYWHERE YOU WORK
iPhone, iPad and Mac, portrait or landscape, light or dark mode – in English, German, Japanese, Turkish, Spanish, French, Italian and Russian. On iPad and Mac: a sidebar, a full-height drawing and keyboard shortcuts.
TRIANGLE CALCULATOR PRO
• No ads
• Full Any Triangle results: area, perimeter, heights, radii and both SSA solutions
• Every step of every solution
• Angles in degrees, minutes and seconds
• Unlimited history and Copy All
The right-triangle solver and every side and angle of any triangle are always free. Pro options and prices are shown in the app.
Terms of Use: https://monsware.com/right-triangle-terms
Privacy Policy: https://monsware.com/right-triangle-privacy
Ratings & Reviews
• Watch a short ad to try every Pro feature free for 1 hour
• After setup, the Pro screen opens once with two clear plans. Close it and keep calculating for free
• The Pro screen now explains the free trial: what you get today and when the first charge comes
The developer, Muhammed Samil DEMIR, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Muhammed Samil DEMIR
- Size
- 23.2 MB
- Category
- Education
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
English and 7 more
- English, French, German, Italian, Japanese, Russian, Spanish, Turkish
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Weekly Premium $1.99
- Premium Yearly $24.99
- Monthly Premium $4.99
- Pro Lifetime $29.99
- Pro Lifetime $49.99
- Copyright
- © 2026 Monsware
