Numbers 170-179

A page of the Numeropedia - the Special Encyclopedia of Numbers

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170

[Math.]  Each internal angle of a regular 36-sided polygon is 170o.

[Tech.]  Automobile Tire’s Speed Rating

 Tire Rating L M N P Q R S Max. Speed (mph) Max. Speed (kph) 75 120 81 130 87 140 93 150 100 160 106 170 112 180 Tire Rating T U H V W Y Max. Speed (mph) Max. Speed (kph) 118 190 124 200 130 210 149 240 168 270 186 300

[World]  The ISO country code for Colombia. (ISO-3166).

171

[Math.]  Each internal angle of a regular 40-sided polygon (tetracontagon) is 171o.

[Math.]  A triangular number (sum of all integers from 1 to 18): 171 = 1+2+…+17+18.

[Phone]  The emergency telephone number dialing within Venezuela.

172

[Math.]  Each internal angle of a regular 45-sided polygon is 172o.

[Sport]  The height (cm, centimeters) off the ground of the bull’s-eye on a dartboard (= 5 feet 8 inches = 172.72 cm).

173

[Math.]  A prime number.

[Math.]  1732 = 29929, having only 2 different digits.

174

[Math.]  Each internal angle of a regular 60-sided polygon (hexacontagon) is 174o.

[World]  The ISO country code for Comoros. (ISO-3166)

175

[Math.]  Each internal angle of a regular 72-sided polygon is 175o.

[Math.]  175 = 11+72+53.

[Sport]  The weight range for the Light Heavyweight boxing class is 168-175 lbs. The weight range for the men’s Cruiserweight boxing class is 175-190 lbs.

[Sport]  The weight range for the women’s Heavyweight boxing class is over 175 lbs.

[Tech.]  Automobile tires used in the U.S. have tire section width of 145, 155, 165, 175, 185, 195, 205, 215, 225, 235, 245 or 255 (millimeters).

[World]  The ISO country code for Mayotte. (ISO-3166)

176

[Math.]  Each internal angle of a regular 90-sided polygon (enneacontagon) are 176o.

177

[Math.]  Each internal angle of a regular 120-sided polygon is 177o.

178

[Math.]  Each internal angle of a regular 180-sided polygon is 178o.

[Math.]  Five square numbers using the same digits: 1282 = 16,384, 1782 = 31,684, 1912 = 36,481, 1962 = 38,416 and 2092 = 43,681.

[Math.]  Squares and cubes of 2 numbers using the same digits: 1782 = 31,684 and 1962 = 38,416 & 1783 = 5,639,752 and 1963 = 7,529,536.

[World]  The ISO country code for Congo. (ISO-3166)

179

[Calendar]  The number of even days in a year is 15×12–1 = 179.

The number of odd days in a year is 186 or 187 in the leap year.

[Math.]  A prime number.

[Math.]  14141 = 179×79.

[Math.]  Each internal angle of a regular 360-sided polygon is 179o.

170-179

[Library]  Numbers 100-199 are the first 3 digits in Dewey Decimal Classification System call numbers for library books in Philosophy, Psychology and Ethics… Numbers 170-179 are for books in Ethics.

100-199

[Education] The numbers commonly assigned for upper level undergraduate (last 2 years, junior and senior) courses in most U.S. universities and colleges.