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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?
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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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