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Which organism appeared on Earth first?
asked
Jan 13, 2017
Biology
high-school
1
answer
2
votes
129k
views
Why can't a triangle have more than one obtuse angle?
asked
Jan 7, 2017
Mathematics
middle-school
1
answer
5
votes
13.5k
views
Explain why the order of the coordinates does not matter when calculating length in geometry?
asked
Apr 24, 2015
Mathematics
high-school
2
answers
4
votes
61.1k
views
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