why is the equator the only great circle?
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нℓσ!
ᴛʜᴇ ᴏɴʟʏ ʟɪɴᴇ ᴏғ ʟᴀᴛɪᴛᴜᴅᴇ, ᴏʀ ᴘᴀʀᴀʟʟᴇʟ, ᴄʜᴀʀᴀᴄᴛᴇʀɪᴢᴇᴅ ᴀs ᴀ ɢʀᴇᴀᴛ ᴄɪʀᴄʟᴇ ɪs ᴛʜᴇ ᴇǫᴜᴀᴛᴏʀ ʙᴇᴄᴀᴜsᴇ ɪᴛ ᴘᴀssᴇs ᴛʜʀᴏᴜɢʜ ᴛʜᴇ ᴇxᴀᴄᴛ ᴄᴇɴᴛᴇʀ ᴏғ ᴛʜᴇ ᴇᴀʀᴛʜ ᴀɴᴅ ᴅɪᴠɪᴅᴇs ɪᴛ ɪɴ ʜᴀʟғ. ... ᴛʜᴇ ᴍᴏsᴛ ғᴀᴍᴏᴜs ᴜsᴇ ᴏғ ɢʀᴇᴀᴛ ᴄɪʀᴄʟᴇs ɪɴ ɢᴇᴏɢʀᴀᴘʜʏ ɪs ғᴏʀ ɴᴀᴠɪɢᴀᴛɪᴏɴ ʙᴇᴄᴀᴜsᴇ ᴛʜᴇʏ ʀᴇᴘʀᴇsᴇɴᴛ ᴛʜᴇ sʜᴏʀᴛᴇsᴛ ᴅɪsᴛᴀɴᴄᴇ ʙᴇᴛᴡᴇᴇɴ ᴛᴡᴏ ᴘᴏɪɴᴛs ᴏɴ ᴀ sᴘʜᴇʀᴇ.
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The only line of latitude, or parallel, characterized as a great circle is the equator because it passes through the exact center of the Earth and divides it in half. ... The most famous use of great circles in geography is for navigation because they represent the shortest distance between two points on a sphere.
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