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Mathematics 10 Online
OpenStudy (anonymous):

triangle ABC= triangle EDC by SAS. How do you know that the included angles ACB and DCE are congruent even though they are not marked?

OpenStudy (anonymous):

hartnn (hartnn):

heard about vertical angles ?

hartnn (hartnn):

|dw:1353560055765:dw|

hartnn (hartnn):

ACB and DCE are vertical angles , if u observe.

hartnn (hartnn):

got it ?

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