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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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## Rainwater tank

The calculator calculates the amount of collected rainwater from the roof of the given dimensions. Long description
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## The projected increase in child

Calculator based on the sex of the baby and given parental height calculated the projected increase in the child as an adult.
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## Calculator VAT refund for building materials

The calculator calculates the amount of VAT that can be refunded in respect of incurred expenses associated with the purchase of construction materials.
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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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## The percentage reduction in blood urea after dialysis

Calculator to the data is given as change the level of urea in the blood after hemodialysis.