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  • one year ago

What is the missing step in this proof? Given:ΔABC (view diagram) prove:The sum of the interior angle measures of ΔABC is 180°. possible answers Below A.Statement: ∠4≅∠5, and ∠1≅∠3. Reason: Alternate Interior Angles Theorem B.Statement: DE←→ is parallel to AC¯¯¯¯¯. Reason: AB¯¯¯¯¯ is a transversal cutting DE←→ and AC¯¯¯¯¯. C.Statement: ∠1≅∠4, and ∠3≅∠5. Reason: Alternate Interior Angles Theorem D.Statement: ∠1≅∠4, and ∠3≅∠5. Reason: ∠1 and ∠4 , and ∠3 and ∠5 are pairs of supplementary angles. http://contentlaunch.ple.platoweb.com/players/HTML/MasteryTest.aspx?&sessionid=rni

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  1. anonymous
    • one year ago
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    never mind it was c

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