(a) with the aid of a diagram, explain eclipse of the moon
(b) State three charateristics of great circles
(c) Outline three uses of great circles
(a) explanation of the eclipes of the moon
(b) * they are limitless in number
* they run in all directions
* each halve is called hemisphere
(c) * for locating places on the earth's surface
* in determining directions
* in saving time in aviation and navigation
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