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Take a look to our Cheat Sheet with some of the major mathematical concepts. You can download them to be by your side when you study.

We have a set of calculators to help you quickly perform a series of calculations. Calculate the roots of a quadratic equation, step by step!

Check out our list of formulas, symbols, curves and more! Search our list of frequently asked questions for answers to your questions.

With the help of Geogebra Software, you will finally be able to understand some important concepts of geometry. Give it a try!

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"I could never have gone far in any science because on the path of every science the lion Mathematics lies in wait for you."

C.S. Lewis

If I multiply two negative numbers the result will be a positive one, why does it happen?

**Obtuse triangle**

A triangle which contains an obtuse angle.