An Episodic History of Mathematics. Mathematical Culture by Steven G. Krantz

By Steven G. Krantz

An Episodic background of Mathematics can provide a chain of snapshots of the heritage of arithmetic from precedent days to the 20 th century. The rationale isn't to be an encyclopedic background of arithmetic, yet to offer the reader a feeling of mathematical tradition and historical past. The ebook abounds with tales, and personalities play a robust position. The publication will introduce readers to a couple of the genesis of mathematical principles. Mathematical background is intriguing and worthwhile, and is an important slice of the highbrow pie. an excellent schooling involves studying diverse tools of discourse, and positively arithmetic is among the such a lot well-developed and demanding modes of discourse that we've got. the focal point during this textual content is on getting concerned with arithmetic and fixing difficulties. each bankruptcy ends with a close challenge set that would give you the scholar with many avenues for exploration and lots of new entrees into the topic.

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Of course we know from other considerations that the area inside this circle is π · r2 = π · 12 = π. 598 . . 14159265 . .. So our approximation is quite crude. The way to improve the approximation is to increase the number of sides in the approximating polygon. In fact what we shall do is double the number of sides to 12. 22 shows how we turn one side into two sides; doing this six times creates a regular 12-sided polygon. Notice that we create the regular 12-sided polygon (a dodecagon) by adding small triangles to each of the edges of the hexagon.

To this day, in memory of Archimedes, people cry Eureka to celebrate a satisfying discovery. 16. Archimedes was one of the first to study and appreciate the power of levers. He realized that a man of modest strength could move a very great weight if he was assisted by the leverage afforded by a very long arm. Not fully understanding this principle, Hieron demanded of Archimedes that he give an illustration of his ideas. And thus Archimedes made his dramatic claim. As a practical illustration of the idea, Archimedes arranged a lever system so that Hieron himself could move a large and fully laden ship.

29, having base 2 − 2 + 3 and side length 1. We may divide the triangle into two right triangles, as indicated in the figure. And then solve one of the right triangles using the Pythagorean theorem. √ The solution is that the height of this right triangle is 2 + 2 + 3/2. Altogether, then, the area of the triangle which is one twenty-fourth of the polygon is 1 1 A(T ) = ·(base)·(height) = · 2 − 2 2 2+ √ 2+ 3· 2+ 2 √ 3 √ = 2− 4 3 . 29 We conclude that the area of the 24-sided regular polygon is √ √ 2− 3 A(P ) = 24 · = 6 2 − 3.

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