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Number of tetrahedral

Tetrahedral numbers are the natural numbers, for which it is possible to construct a tetrahedron formnego of bullets. They are a special case of the pyramidal numbers.        


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Conversion between number bases

Converter allows you to convert numbers between number bases - binary (binary), trójkowym, czwórkowym, Friday, szóstkowym, siódemkowym, octal (octal), dziewiątkowym, decimal (decymalnym) jedenastkowym, dwunastkowym, trzynastkowym, czternastkowym, piętnastkowym, hexadecimal (hex). Typed characters that are not numbers and the letters A, B, C, D, E, F are ignored.      
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Trigonometric functions calculator

Calculator by entering an angle in degrees or radians calculated values ​​of the basic trigonometric functions.
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The risk of detection of osteoporosis in men

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Centroid of the triangle

The calculator calculates the centroid of the triangle. Centroid is the point through which the median of the three triangle. It divides each median in the ratio of 2:1.            
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Field and circumference of a circle

Jak obliczyć pole i obwód koła?
The calculator based on the specified radius of the area and perimeter of a circle.          
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Unit Converter glucose (blood sugar)

converter converts the blood sugar level in milligrams per deciliter (mg / dL) in millimoles per liter (mmol / L) and vice versa. http://pl.wikipedia.org/wiki/Glikemia      
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Calculator spending on cigarettes

Calculator based on the price quoted for the package and the amount consumed per month package, gives the annual cost of smoking cigarettes.