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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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## Consumption Calculator paint Flügger

Calculator based on the data entered the room indicates the approximate amount of paint needed to make Flügger his painting.
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## Rainwater tank

The calculator calculates the amount of collected rainwater from the roof of the given dimensions. Long description
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## Consumption Calculator mortar and grout

The calculator calculates the approximate consumption of mortar and grout when laying tiles on the given area , taking into account the amount of work gear tooth , tile size and the width and depth of the weld.
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## Area of ​​a triangle using Heron's formula

calculator calculates the area of ​​a triangle after a length of three sides.
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## Battery charging time calculator

Calculator to the data calculates the estimated time of charging.