Natural limestone

The Great Sphinx of Giza is situated west of Cairo. The site is a plateau containing the three great pyramids of Khufu, Khafra, and Menkaura, together with the Sphinx and a number of smaller pyramids, temples, and tombs. The Giza structures were built by 4th Dynasty kings at the height of the Old Kingdom. Carved out of a natural limestone outcrop, the Sphinx is 19.8 metres (65 feet) high and 73.2 metres (240 feet) long. It is located a short distance from the Great Pyramid.

The largest island in the world is Greenland. Australia is considered a continent because it has unique plant and animal life. Antarctica also is a continent - larger than Europe and Australia. Greenland, although quite big, shares the habitat features of Northern America

The smallest island in the world - according to the Guiness Book of Records - is Bishop Rock. It lies at the most south-westerly part of the United Kingdom. It is one of 1040 islands around Britain and only has a lighthouse on it. In 1861, the British government set out the parameters for classifying an island. It was decided that if it was inhabited, the size was immaterial.

The smallest independent island country is the Pacific island of Nauru.

The country with the most Islands - Indonesia as the country with the most islands. In fact, Indonesia consists only of islands - 13 667 of them, 6000 of which are inhabited

Appomattox Court House

Napoleon Bonaparte, ruler of France

Cyrus the Great

pi--which is written as the Greek letter for p, it is the ratio of the circumference of any circle to the diameter of that circle. Regardless of the circle's size, this ratio will always equal pi. Pi is important because it explains that circles are endless. We would not be able to understand circles without pi and find their volume surface area lateral area or use them in anything that has to do with math.

For example The area of a circle is pi times the square of the length of the radius, or "pi r squared": A = pi*r^2
pi is a decimal, it goes on forever, most of the time it is 3.14

There are also many practical applications of pi and its currently calculated 1.241 trillion decimals. The current world record is held by Yasumasa Kanada of the universityu of Tokyo who in December 2002 calculated Pi to 1.2411 trillion decimal places in about 600 hours. Just think anythikng to do with • aCircle, aphere, or a Cyndrilical Solid (cylinder) involves the formulae Pi.

Reference

http://www.sciam.com/article.cfm?id=what-is-pi-and-how-did-it&topicID=11
A History of Pi by Petr Beckman (Dorset Press).
http://mathforum.org/dr.math/faq/faq.pi.html