![]() Divide a circle into 6400 (roughly 2pi*1000) and an angle of 1mil means 1m at 1000m (or 1ft at 1000ft). Like metric time (100 secs in a minute and 100 mins in an hour) it doesn't really have any advantages over splitting an angle into 90deg.Īnother useful angle unit that never caught on outside the rather specialized business of dropping shells on people is the artillery mil. The gon is one of the french revolution attempts to make sensible metric measurements - but never really caught on. The babylonians count in base of 60, meant that they go from their 1 to 60 before going to our 10?Ī bit of both, they had symbols for 1 and 10 (like the romans) but use them to count up to 60 then went to the next column ( 60 is handy for doing division because it divides by 2, 3, 4, 5, 6, 10, 12, 15, 20, and 30) so a hundred would be 1 '60' and 4 '10's Pi = 25/8 = 3.125."īasically, If I understood that correctly, a hexagon (having 6 sides) is similar to a circle, and if you choose a hexagon with a radius of 1 unit then the perimeter is 6 units, but in their number system 1 unit is 60 of our units, so they chose the number of degrees in a circle to be the same as the perimeter of a "unit-hexagon", or 360. That was evidently the reason why they chose to divide the circle into 360ĭegrees (and we are still burdened with that figure to this day). The Babylonians knew, of course, that the perimeter of a hexagon isĮxactly equal to six times the radius of the circumscribed circle, in fact Sexagesimal system, i.e., their base was 60 rather than 10). Modern notation is given by 57/60 + 36/(60^2) (the Babylonians used the To the circumference of the circumscribed circle equals a number which in Was partially published only in 1950, is devoted to various geometricalįigures, and states that the ratio of the perimeter of a regular hexagon (wedge-shaped) script on soft clay tablets with a stylus, and the tablets Knowledge could be passed from one person to others, and from one Man's greatest inventions, namely, writing through written communication, Should make the interjection that the Sumerians were first to make one of "In 1936, a tablet was excavated some 200 miles from Babylon. Write the decimal number 536.072 in expanded notation.Hi, i'm just wondering why is a circle 360 degree? Why not put it 400 for easy calculation? = 700 + 80 + 9 Expanded Notation with Decimalsĭecimal numbers can also be written in expanded notation by using exponential powers of ten. Write the thousands, hundreds, tens and ones for each of the following numbers:ĥ973 = 5 thousands + 9 hundreds + 7 tens + 3 ones Writing a number in expanded notation entails showing the place of a number in exponential powers of ten.Ĥ,981 = (4 x 1,000) + (9 x 100) + (8 x 10) + (1 x 1) In this example, the place value of 0 in the number is zero therefore, the value in the tens digit is not represented because there are no tens. For instance, 4 and 9 in the number are represented as 4000 and 900 respectively.ġ5,807 in expanded form is represented as: In this method, every number that comes after a digit is replaced with zeros. The number 4,981 can be written in expanded form as: These methods of writing a number in expanded notation and forms are illustrated in the examples below. To expand a particular number (from its standard form), we need to expand it into the sum of each digit multiplied by its matching place value (ones, tens, hundreds, and so on).
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |