A short course in astronomy and the use of the globes (1871)
Kiddle, Henry, 1824-1891 · New York, Chicago, Ivison, Blakeman, Taylor & co. · leaf 16
e those whose planes divide thesphere into unequal parts. 36. Tlie Poles cf a Circle are two opposite points on thesurface of the sphere, equallydistant from the circumferenceof the circle. The poles of a great circle are, ofcourse, 90° distant from every pointof its circumference. Two circles of… … PEKPENDICTTLAH PLAITES. 31. What is the diameter of a sphere ? 32. The radius of a sphere ? 33. Howare circles of the sphere divided ? 34. What are great circles ? 35. Small circles ?36. Poles of a circle ? u INTRODUCTIO N.
Astronomy
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