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The Two Perpendicular Lines Theorem is based on _____. A. the definition of parallel lines B.the fact that corresponding angles are congruent C.the Paradox of Parallels D.the fact that corresponding angles
answered
May 23, 2017
Mathematics
high-school
4
votes
21.0k
views
What concept is essential to the study of economic systems?
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Mar 9, 2017
History
high-school
4
votes
31.3k
views
For the first 11 years of its existence, which governmental system did the United States use? monarchy confederation federation theocracy
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Jan 27, 2016
History
high-school
5
votes
184k
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