...end of it, the angle between the directions of A and B would be 23". (A circle is divided into 360 degrees, each degree into 60 minutes, and each minute into 60 seconds.) The A rays will come to a focus at a in the upper part of the tube, the B rays at 6 in the lower part,...

...For FIG. 23. — Semicircular protractor. scientific purposes the circle has been divided into 300 degrees, each degree into 60 minutes and each minute into 60 seconds. For laying off these degrees and fractions thereof directly on to paper, the protractor has been made....

...127. History of Methods of Measuring Angles. The division of the circumference of a circle into 360 degrees, each degree into 60 minutes, and each minute into 60 seconds, is due to the Babylonians. This system of angular measurement was transmitted from the Babylonians...

...questions might run thus: — What do you propose to do with the circle? At present it is divided into 360 degrees, each degree into 60 minutes, and each minute into 60 seconds. I suppose you would divide it into 100 degrees, each degree into 100 minutes, and each of these into...

...127. History of Methods of Measuring Angles. The division of the circumference of a circle into 360 degrees, each degree into 60 minutes, and each minute into 60 seconds, is due to the Babylonians. This system of angular measurement was transmitted from the Babylonians...

...system of longitude and latitude in which the meridian and parallel circles were each divided into 360 degrees, each degree into 60 minutes, and each minute into 60 seconds (the sexagesimal system).10 N. Pole Longitude titude FIGURE 1.2. The system of meridians and parallels...

...some primitive calendars (until calendars became more accurate). We still divide a circle into 360 degrees, each degree into 60 minutes, and each minute into 60 seconds. The number 360 is wonderful because it is evenly divisible by so many smaller numbers. You can divide...

...components of a double star is given in seconds or minutes of arc. A full circle is divided into 360 degrees, each degree into 60 minutes and each minute into 60 seconds, so that one second of arc is a very small angle indeed. It is worth remembering that the distance between...

...based on twelves, not tens. This system is directly responsible for the division of circles into 360 degrees, each degree into 60 minutes, and each minute into 60 seconds of arc (Erwin Raisz, 1948. General Cartography. McGraw-Hill, pg. 5). Figure 5-4. Babylonian Map. Early...

...360 w Figure 4-1. Prime meridian and equator. PARALLELS MERIDIANS f* A/ Figure 4-2. Reference lines. degrees each degree into 60 minutes, and each minute into 60 seconds. The degree is symbolized by °, the minute by ', and the second by ". Starting with 0° at the equator,...