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Mathematics 20 Online
OpenStudy (lilkg77):

Question in screenshot, please help!

OpenStudy (lilkg77):

OpenStudy (aabomosalam1998):

When two lines intersect, pairs of nonadjacent angles are called vertical angles and they have the same measure. |dw:1472945971528:dw|

OpenStudy (blazeryder):

Vertical angles are the angles opposite of each other when two lines cross. They are called vertical because they share the same Vertex.

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