Calculation of percentages

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Did you know ? The rules that mathematical logic derives from the research of thinking are analogous to the rules of mathematical, especially algebraic, operations. The task of mathematical logic is actually the same as the task of traditional logic, namely to develop procedures by means of which we could verify the correctness of our logical conclusions, or in other words, by means of which we could distinguish valid conclusions from invalid ones.

## Calculation of percentages

## Percentage increase

## Percentage change

## Direct proportion

## Indirect proportionality

## Share in percentage

## Profit from interest

## Price without VAT

## Price with VAT

## Trade margin

## Surcharge

## Discount in percentage

Geometric calculations

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Did you know ? The oldest signs of geometry can be traced back to ancient Egypt. The Rind Papyrus describes a strikingly accurate method of calculating an approximation of Ludolf's number, with an error of less than one hundredth. The Rind papyrus also describes one of the first attempts at squaring the circle, as well as a certain cotangent analogy.

## Center of the triangle

## Angles of a triangle

## Polygon

## Cube

## Cylinder

## Ellipsoid

## Pyramid

## Sphere

## Sphere segment

## Block

## Cone

## Circular segment

Physics calculations

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Did you know ? Physics is a natural science that deals with the study of nature and its laws using mathematical models and experiments. Physics deals with various fields such as mechanics, electromagnetism, optics, thermodynamics, quantum mechanics, cosmology and many more.