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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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Weighted average ratings

The calculator calculates the weighted average of the ratings of the following items.              
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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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NIP correctness in Poland

Jak sprawdzić poprawność numeru NIP?
Verifier allows you to validate the tax identification number entered
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Parallel connection of resistors

The calculator calculates the equivalent resistance of two resistors connected in parallel.            
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Employee

Calculator average revenue per employee in the company

Calculator on the basis of the specified amount paid salaries and number of employees, calculates the average annual and          
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Verification of the social security number in Poland

It presents data deriving from the unique social security number, such as date of birth, sex, serial number and check its correctness.
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Calculator floor panels

Calculator based on the dimensions of the area to put the panels and occupancy data on number of panels in one package, calculate how much you have to buy packages of panels to cover the entire room.