www.treugolniki.ru

About the treugolniki website. ru - all about triangles and more

Triangles are not just a figure of three sides and three angles, as it might seem at first glance. On the websitetreugolniki. ruthis simple geometric object is revealed in all its depth. Note that the site doesn't just list properties, it lives by them. Each task is a step forward along the path of understanding. From equality to similarity, from area to trigonometric ratios - everything is collected here.

The site is aimed at schoolchildren preparing for the Unified State Exam, but adults will also find it useful. No unnecessary pictures, no spam, just pure meaning. The texts are written without pathos, but with soul. It is clear that the authors know their topic. Example? The sum of two angles of a parallelogram is 46 - and the analysis immediately begins: why exactly opposite angles? Why not adjacent? Here the formula is not just given, but it is interpreted.

In the sections you can find solutions to real problems that are often encountered in exams. For example, how to find the diagonal area of ​​a square? Or how to determine the larger base of a trapezoid if the height and tangent of the angle are known? All these questions are asked in practice, and the answers are given with explanations. Sometimes even more than necessary - but that's good. This approach helps not to remember, but to understand.

• Problems about parallelograms - not just numbers, but logic
• Isosceles trapezoids - with heights, bases and tangents
• Trigonometry in action: sine, cosine, leg ratios
• Formulas - not memorized, but used

Why is it worth a look?

Well, firstly, because the site alive. There are no placeholders in the texts, no messages like Site is temporarily unavailable or Domain is for sale. On the contrary, everything works as it should. There is pagination, search, categories, navigation. This is not a hosting page, it is a real resource. Even the date in the footer - 20142026 - speaks of stability, that the project has been alive for a long time.

I wonder why triangles? Because they are the foundation. Without them it is impossible to construct geometry. This means that without understanding triangles it is impossible to prepare for exams. And here - this basis is clearly built.

Conclusion

Triangles are more than a figure. This is the key to understanding space. And the site is treugolniki. ru is one of those few resources where everything is explained simply, without fluff. Take your time, step by step. This approach is rare. And, frankly, it’s nice to see that such a project has been alive for ten years. Many sites disappear quickly, but this one remains. Why? Because it works. Simple and reliable.

Total: the site functions normally, the topic is clear - geometry, triangles, problems on the Unified State Exam. No signs of distress. Therefore, the answer is not ERROR.

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created:       2014-01-07T17:21:56Z
paid-till:     2027-01-07T18:21:56Z
free-date:     2027-02-07
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Last updated on 2026-07-14T03:13:01Z
        

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