Terms of Service

Acceptance of Terms

By accessing or using the Triangle Calculator provided by XinYuMaTou, you confirm that you have read, understood, and agree to be bound by these Terms of Service. If you do not agree with any part of these terms, please do not use our calculator or any other pages on this website.

These terms apply to all visitors, users, and others who access or use the calculator tool. Your use of the calculator constitutes your acceptance of these terms and your agreement to be bound by them.

License to Use the Calculator

Subject to these Terms of Service, XinYuMaTou grants you a free, non-exclusive, non-transferable, revocable license to use the Triangle Calculator for personal, educational, and professional reference purposes.

What You May Do

• Use the calculator to solve triangle problems for homework, study, or general reference.
• Use the visual diagram feature to better understand the geometry of triangles.
• Access and use the calculator from any compatible web browser.
• Share a link to our calculator with others who may find it useful.

What You May Not Do

• Republish, resell, or redistribute the calculator as your own work.
• Copy, modify, or reverse-engineer the source code of the calculator for commercial purposes.
• Use automated systems or bots to send large volumes of requests to our pages.
• Use our calculator in a way that disrupts, damages, or impairs the operation of our website or any third-party service.
• Attempt to bypass any access control, security measure, or rate limiting implemented on the website.

Intellectual Property

All original content on this website — including the calculator's source code, user interface design, written explanations, educational articles, and supporting documentation — is the property of XinYuMaTou and is protected by international copyright laws.

The mathematical formulas used by the calculator (Law of Cosines, Law of Sines, Heron's formula) are fundamental mathematical concepts in the public domain and are not subject to copyright protection. However, the implementation, presentation, and original description of these formulas on our website are protected.

Trademarks

"XinYuMaTou" and any related logos, product names, or service marks used on this website are the property of XinYuMaTou. You may not use these marks in connection with any product or service that is not ours, or in any manner that is likely to cause confusion.

No Warranty — "As Is" Basis

The Triangle Calculator is provided "as is" and "as available" without any warranty of any kind, either expressed or implied. While we have invested significant effort in ensuring the accuracy and reliability of the calculation logic, we make no warranty that:

• The calculator will meet your specific requirements or expectations.
• The calculator will operate without interruption, delay, errors, or loss of data.
• The computed values are accurate enough for every specific application.
• The website or calculator is free of viruses or other harmful components.

While the mathematical formulas are implemented using standard JavaScript double-precision floating-point arithmetic (which provides approximately 15 to 16 significant digits of precision), rounding errors may occasionally occur with very large or very small input values.

Limitation of Liability

To the fullest extent permitted by applicable law, XinYuMaTou shall not be liable for any direct, indirect, incidental, special, consequential, or punitive damages arising from or related to your use of the Triangle Calculator, including but not limited to:

• Loss of data, time, or productivity resulting from the use of the calculator.
• Errors, mistakes, or inaccuracies in computed results.
• Decisions made based on calculator output in engineering, construction, surveying, navigation, or other precision-critical applications.
• Any interruption or cessation of transmission to or from the website.
• Any bugs, viruses, trojan horses, or similar that may be transmitted to or through our website by third parties.

Calculated values are for reference only. For engineering, construction, surveying, navigation, or other situations where precision is critical, always verify results with alternative methods and consult a qualified professional.

User Responsibility and Acceptable Use

As a user of our calculator, you are responsible for ensuring that your use of the tool complies with all applicable laws, regulations, and ethical standards in your jurisdiction. Specifically, you agree not to:

• Use the calculator in any manner that could damage, disable, overburden, or impair our website.
• Attempt to gain unauthorized access to our website, servers, or network infrastructure.
• Use automated systems, scrapers, or bots to send large volumes of requests.
• Use the calculator to create derivative tools, applications, or websites without explicit written permission.
• Remove, modify, or obscure any copyright, trademark, or other proprietary rights notice appearing on our pages.

Third-Party Services, Advertisements, and External Links

Our calculator pages may display third-party advertisements (for example, through Google AdSense) to support the continued free availability of the tool. Our pages may also contain links to external websites.

Third-Party Advertisements

Advertisements displayed on our pages are delivered by independent ad networks. We do not endorse, warrant, or take responsibility for the content, products, or services offered in advertisements. Each advertisement is the sole responsibility of the advertiser.

External Links

We are not responsible for the content, privacy practices, or terms of service of any third-party website you may reach through links on our pages, including the main XinYuMaTou website. The appearance of any external link does not imply endorsement or recommendation.

Ad Network Cookies

Third-party ad networks may use cookies, web beacons, or similar technologies to deliver personalized advertisements. For more information about this and how to opt out, please see our Privacy Policy.

Accuracy and Reliability of Results

While we have taken care to implement classical trigonometric laws accurately, the calculator output depends on the quality of the input values you provide. Please note the following:

• Angle input units: All angle values must be provided in degrees. The calculator does not accept radians, gradients, or other angle units.
• Side input units: The calculator treats side inputs as unitless numerical values. Outputs will be in the same unit system you used for inputs.
• Triangle Inequality Theorem: A valid triangle requires that the sum of any two sides is strictly greater than the third side. The calculator will reject inputs that violate this constraint.
• Rounding: Results are rounded to 4 decimal places for display. Small rounding differences may appear in the least significant digits.

Service Changes and Availability

We reserve the right to modify, suspend, or discontinue any part of our services at any time, with or without notice. We may also limit the availability of certain features or impose restrictions on access to the calculator without liability to you or any third party.

While we strive to keep our calculator available at all times, we cannot guarantee uninterrupted access. Maintenance windows, hosting provider outages, or other technical issues may occasionally affect availability.

Updates to These Terms

We may update these Terms of Service from time to time to reflect changes in our practices, legal requirements, or the addition of new features. All amendments take effect immediately upon posting on this page.

When significant changes are made, we will revise the "Last Updated" date below. We encourage you to check this page periodically to stay informed about the current version of the terms.

Your continued use of the Triangle Calculator after any modifications to these Terms of Service constitutes your acceptance of the updated terms.

Governing Law and Disputes

These Terms of Service shall be governed by and interpreted in accordance with applicable law, without regard to conflict-of-law principles. Any dispute arising from these terms or your use of the calculator shall first be resolved through good-faith negotiation between the parties.

If a dispute cannot be resolved through negotiation, the parties agree to attempt resolution through alternative dispute resolution mechanisms before pursuing formal legal proceedings.

Contact Information

If you have questions about these Terms of Service, if you would like to report a violation, or if you need clarification about acceptable use of our calculator, please contact us via email at xin_yu@7986455.xyz. We welcome feedback from students, teachers, engineers, and anyone who finds this tool useful.

We aim to respond to all legitimate inquiries within a reasonable timeframe.

Last Updated: June 17, 2026