# Triangle2

> Fieldwork calculator for triangles, cones, pipes, and complex geometric developments. (iPhone/iPad app by sasaki ryo.)

- Source: https://appshunter.io/ios/app/triangle2/id333257494 (this page in markdown: same URL + `.md`)
- Developer: [sasaki ryo](https://appshunter.io/developer/318552526)
- Category: Business, Productivity
- Price: $4.99
- Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 14.0 · 6 MB
- Languages: American English, French (France), Japanese
- Released: 2009-10-07
- Data updated: 2026-06-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/triangle2/id333257494/reviews.md

## What is Triangle2?

This is a calculator application created by me, a canner, focusing on the functions of a calculator necessary for field work. 
Even if you don't understand trigonometric functions, you can easily calculate with this calculator.
It can calculate right triangles and unequal triangles.
It can calculate memory, answer memory, pi, repetition, parentheses, trigonometric functions, and cosine theorem. 
Develop cones (including misalignment), diagonal cuts, R-cuts, T-pipes, shrimp tubes, rounded corners, rounded corners (eccentricity), hopper eccentricity, pipes from mirror plates, connecting pipes to tapered pipes, screw wings, and calculate PCD.
It is possible to display the development on the floor in full size with AR for a specific development.


User's Manual ############################

Calculator section
Press and hold the "ANS" button to display past calculation results.
Tap the label of the calculation result (right after pressing =) to mark the value in the ANS list.
Tap the white button to enter the value displayed on the label.
Swipe the screen to the left or right to rotate the right triangle.
Swipe the screen up and down to flip the right triangle.
Enter two right triangles and three unequal triangles.
Tap the "Cal" button to display the calculation result.
Tap "Cl" button to clear the displayed value.
You can also use the "0" label to erase only the specified locations.
If you touch the button and slide it down, the numerical value of the calculation result will be displayed on the label, and can be used for the next calculation.
Trigonometric calculations can be done with
By sliding the [4] and [6] buttons, you can go back and forward.
Pressing the CLR button once will erase the number.
Press twice to reset the rotation.
Press and hold to erase numbers, reset rotation, and erase memory.
Press and hold to erase numbers, reset rotation, and clear memory.
Automatic input of pipe outline
Example 50A -> Input "5", "0", "1 slide".
　　1¼B -> Input "1", "4", "1" and "2 slides".
Each slide twice in succession will reduce the value by half.

Expansion section
The input method is the same as in the calculator section.
To expand a pipe, PCD, or mirror, slide the screen to the left or right to select the expansion diagram.
Basically, all buttons need to be entered, but in some places "0" can be used.
For round corners (eccentricity), double-tap the screen after entering the numerical value for round corners to switch to the input screen.
Please enter the division of the circumference in multiples of 4.
The calculation result is an image, so it may differ from the actual shape.

Disclaimer
Although every effort has been made to ensure the accuracy of the calculation results in this application, the accuracy is not guaranteed.
Please note that we are not responsible for any damage, loss, or disadvantage caused by the use of this application.

## Key features

- Right and unequal triangle calculations
- Cone and pipe development calculations
- Trigonometric functions and cosine theorem
- AR display for full-size developments
- Memory and answer memory functions
- User-friendly manual and intuitive controls

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/triangle2/id333257494/reviews.md

### 5/5 — Amazing!

*2010-01-26, version 0*

Does what my TI-84 could only dream of doing with triangles. 99 cents well spent! :D

## Frequently asked questions about Triangle2

### What types of triangles can Triangle2 calculate?

Triangle2 can calculate both right triangles and unequal triangles. The app allows users to input specific values for these triangle types to perform calculations.

### Does Triangle2 support AR features?

Yes, Triangle2 supports AR display for specific developments, allowing users to visualize them in full size on the floor. This feature aids in practical application and understanding of complex shapes.

### How does Triangle2 handle complex pipe and cone calculations?

Triangle2 can calculate various complex shapes including cones (with misalignment), diagonal cuts, R-cuts, T-pipes, shrimp tubes, rounded corners, and pipes from mirror plates. The app provides specific input methods for these detailed calculations.

### What is the price of Triangle2?

Triangle2 is a paid application priced at $4.99. This one-time purchase grants access to all its advanced calculation features.

### What devices is Triangle2 compatible with?

Triangle2 is compatible with iPhone, iPod, and Apple Watch devices. This broad compatibility ensures users can access its features across multiple Apple platforms.

### How frequently is Triangle2 updated?

Triangle2 was last updated on October 22, 2023, with version 2.69.1. This indicates regular maintenance and potential feature additions or improvements.

### What is the age rating for Triangle2?

Triangle2 has an age rating of 4+. This suggests the app's content and interface are suitable for young children and above.

### Does Triangle2 have ads?

Based on the provided data, there is no information indicating that Triangle2 contains advertisements. As a paid app, it is likely ad-free.

## Version history (last 5 releases)

### 2.69.1 — 2023-10-22

Fixed a bug in the order of numbers in the square pipe calculation results.

### 2.69 — 2023-09-06

The color of lines in AR images can be changed.

### 2.68.2 — 2022-10-23

Fixed a bug that a part of the expanded image is hidden depending on the model.

### 2.68.1 — 2022-09-23

Compatible with iPhone14 series
Fixed image display

### 2.68 — 2022-08-17

New development added to Cone

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## More apps by sasaki ryo

- [TriangleS](https://appshunter.io/ios/app/triangles/id1572386611)
- [Triangle3](https://appshunter.io/ios/app/triangle3/id1643788233)
- [Cadrio](https://appshunter.io/ios/app/cadrio/id6760935730)

All apps by sasaki ryo: https://appshunter.io/developer/318552526

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*