On a flat plane, what do parallel lines do?
AnswerNever meet
Parallel lines stay the same distance apart forever.
Challenge · Facts & stats
Line facts & stats
7 fact-checked facts about lines in math, maps and time, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
Which imaginary line divides Earth into Northern and Southern Hemispheres?
AnswerThe Equator
The Equator sits at 0 degrees latitude.
Going deeper
The International Date Line runs mostly through which ocean?
AnswerPacific
It zigzags through the Pacific to avoid splitting countries.
Lines of latitude are also called what?
AnswerParallels
Latitude lines run parallel to the Equator.
On a weather map, lines joining points of equal air pressure are called what?
AnswerIsobars
Isobars show pressure patterns; tightly packed ones mean strong wind.
Expert level
In 3D space, lines that are not parallel and never intersect are called what?
AnswerSkew lines
Skew lines lie in different planes.
The Kármán line, often used to mark where space begins, is at about what altitude?
Answer100 km
The Kármán line is commonly set at 100 km above sea level.
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