|year=c. 300 BC Proposition I:13.] The most obvious way to tell if two angles are vertical angles are if they form a "X"G.
External links
* [http://www.mathopenref.com/anglesvertical.html Definition and properties of vertical angles] With interactive applet
* [http://www.mathopenref.com/tocs/anglestoc.html Angle definition pages] with interactive applets that are also useful in a classroom setting. Math Open Reference
References
Wikimedia Foundation. 2010.
vertical angles — plural noun Opposite angles formed by intersecting lines • • • Main Entry: ↑vertical … Useful english dictionary
Vertical angles — Two lines intersect to create two pairs of vertical angles. One pair consists of angles A and B; the second pair consists of angles C and D. In geometry, a pair of angles is said to be vertical (also opposite and vertically opposite, which is… … Wikipedia
vertical angles — two opposite and equal angles formed by the intersection of two lines … English contemporary dictionary
vertical angles — plural noun Mathematics each of the pairs of opposite angles made by two intersecting lines … English new terms dictionary
Vertical — Ver ti*cal, a. [Cf. F. vertical. See {Vertex}.] [1913 Webster] 1. Of or pertaining to the vertex; situated at the vertex, or highest point; directly overhead, or in the zenith; perpendicularly above one. [1913 Webster] Charity . . . is the… … The Collaborative International Dictionary of English
Vertical angle — Vertical Ver ti*cal, a. [Cf. F. vertical. See {Vertex}.] [1913 Webster] 1. Of or pertaining to the vertex; situated at the vertex, or highest point; directly overhead, or in the zenith; perpendicularly above one. [1913 Webster] Charity . . . is… … The Collaborative International Dictionary of English
Vertical anthers — Vertical Ver ti*cal, a. [Cf. F. vertical. See {Vertex}.] [1913 Webster] 1. Of or pertaining to the vertex; situated at the vertex, or highest point; directly overhead, or in the zenith; perpendicularly above one. [1913 Webster] Charity . . . is… … The Collaborative International Dictionary of English
Vertical circle — Vertical Ver ti*cal, a. [Cf. F. vertical. See {Vertex}.] [1913 Webster] 1. Of or pertaining to the vertex; situated at the vertex, or highest point; directly overhead, or in the zenith; perpendicularly above one. [1913 Webster] Charity . . . is… … The Collaborative International Dictionary of English
Vertical drill — Vertical Ver ti*cal, a. [Cf. F. vertical. See {Vertex}.] [1913 Webster] 1. Of or pertaining to the vertex; situated at the vertex, or highest point; directly overhead, or in the zenith; perpendicularly above one. [1913 Webster] Charity . . . is… … The Collaborative International Dictionary of English
Vertical fire — Vertical Ver ti*cal, a. [Cf. F. vertical. See {Vertex}.] [1913 Webster] 1. Of or pertaining to the vertex; situated at the vertex, or highest point; directly overhead, or in the zenith; perpendicularly above one. [1913 Webster] Charity . . . is… … The Collaborative International Dictionary of English
