{"id":6537,"date":"2013-12-30T21:15:28","date_gmt":"2013-12-30T21:15:28","guid":{"rendered":"https:\/\/schooltutoring.com\/scholarship\/?p=6537"},"modified":"2014-12-02T08:26:55","modified_gmt":"2014-12-02T08:26:55","slug":"math-review-of-the-number-pi","status":"publish","type":"post","link":"https:\/\/schooltutoring.com\/scholarship\/2013\/12\/30\/math-review-of-the-number-pi\/","title":{"rendered":"Math Review of the Number Pi"},"content":{"rendered":"

Overview:<\/strong><\/p>\n

The number pi (\u03c0) is one of the most important and useful numbers in math calculations involving circles, spheres, and other circular objects.\u00a0 It is an irrational number with a decimal that never repeats or ends.\u00a0 As a decimal, pi can be approximated by 3.1415926535.<\/p>\n

What Is Pi?<\/strong><\/p>\n

As a number, pi is the ratio of the circumference of a circle to its diameter.\u00a0 If the perimeter of a circle could be unraveled and measured, it would equal the diameter times pi.\u00a0 Even though supercomputers have calculated the value of pi to over 10 trillion digits, it does not repeat those digits in a pattern.<\/p>\n

How Is Pi Used in Calculating Circles?<\/strong><\/p>\n

Besides the circumference of a circle, pi can also be used to calculate the area of a circle in the formula A=\u03c0r2<\/sup>, where r is the radius (1\/2 the diameter) of the circle.\u00a0 If a circle has a radius of 5 units, the area will be \u03c0\u221952<\/sup> or 3.1416 \u221925 square units , about 78.54 square units.\u00a0 A circle can also be divided into sections called sectors, like the pieces of a pie.\u00a0 The sector is measured by the length of the radius squared times pi times the fraction of the circle the sector covers.\u00a0 Circle graphs use sectors and fractions of the circle.<\/p>\n

How Is Pi Used in Calculating Spheres?<\/strong><\/p>\n

A sphere is a circle in three dimensions, so that it is \u00a0the set of points in space at a given distance from a central point.\u00a0 (Think of a ball or a soap bubble with a clear central point and radius.)\u00a0 The surface area S is measured by 4\u03c0r2<\/sup>.\u00a0 The volume V is measured in cubic units\u00a0 by 4\/3\u03c0r3<\/sup>.<\/p>\n

Other Fun Facts About Pi<\/strong><\/p>\n

Pi is more than an irrational number and mathematical workhorse.\u00a0 It has its own holiday, celebrated on March 14 (also known as 3\/14), known as Pi Day.\u00a0 It is celebrated at many schools, including MIT.\u00a0 Some schools hold competitions to see how many digits of pi can be memorized and recited.\u00a0 As can be expected, round pies of all kinds are eaten.<\/p>\n

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Overview: The number pi (\u03c0) is one of the most important and useful numbers in math calculations involving circles, spheres, and other circular objects.\u00a0 It is an irrational number with a decimal that never repeats or ends.\u00a0 As a decimal, pi can be approximated by 3.1415926535. What Is Pi? As a number, pi is the […]<\/p>\n","protected":false},"author":22,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[10,13],"tags":[285,289,1330,1708],"class_list":["post-6537","post","type-post","status-publish","format-standard","hentry","category-geometry","category-pre-algebra","tag-circle","tag-circumference","tag-pi","tag-sphere"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/schooltutoring.com\/scholarship\/wp-json\/wp\/v2\/posts\/6537","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/schooltutoring.com\/scholarship\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/schooltutoring.com\/scholarship\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/schooltutoring.com\/scholarship\/wp-json\/wp\/v2\/users\/22"}],"replies":[{"embeddable":true,"href":"https:\/\/schooltutoring.com\/scholarship\/wp-json\/wp\/v2\/comments?post=6537"}],"version-history":[{"count":0,"href":"https:\/\/schooltutoring.com\/scholarship\/wp-json\/wp\/v2\/posts\/6537\/revisions"}],"wp:attachment":[{"href":"https:\/\/schooltutoring.com\/scholarship\/wp-json\/wp\/v2\/media?parent=6537"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/schooltutoring.com\/scholarship\/wp-json\/wp\/v2\/categories?post=6537"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/schooltutoring.com\/scholarship\/wp-json\/wp\/v2\/tags?post=6537"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}