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Al-Battani Born: about 858, Harran near Urfa, Mesopotamia (now Turkey) Died: 929 CE Qasr al-JISS (near Samarra), Damascus ... -
Sometimes we think how to calculate quickly without using a calculator or other bentu tool. This discussion is about how calculate the mult... -
Magic triangle is an arrangement of specific numbers within a circle that form a triangle as shown below. Our challenge here is... -
Pi has been known for nearly 4000 years-but even if we count the number of seconds in the year 4000 and calculates pi to a number of places,...
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Original name of al-Khwarizmi was Muhammad Ibn Musa al-khawarizmi. In addition, he identified as Abu Abdullah Muhammad bin Ahmad bin Y... -
NAME complete al-Biruni was Abu al-Raihan Muhammad bin Ahmad al-Khwarizmi al-Biruni. Scientists encyclopedic 9th century, was born in the...
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At this time, the figure is something that is very important for human life. For example, a calendar date, the nominal value of the mone...
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An experiment can be performed to determine the center of the circle without using special tools. It need not even use the term as usually d...
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Ruler is a ruler or measuring device and drawing tools to draw straight lines. There are various kinds ruler, from straight up to the trian...
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There are three methods that are often used in solving quadratic equations, namely factoring, complete perfect square, and use the formu...