Vertical angles
Автор:
Jesse Russell,Ronald Cohn, издатель:
"VSD", ISBN:
978-5-5114-0316-8
High Quality Content by WIKIPEDIA articles! In geometry, a pair of angles is said to be vertical (also opposite and vertically opposite, which is abbreviated as vert. opp. ?s) if the angles are formed from two intersecting lines and the angles are not adja
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