Try this: Find "y." How does CPCTC help? A ABC EA ADC. Find y. A (3y) 21° D C С B. DO Pear Deck Interacti Do nove Students, enter a number!

Stackdisplay asked Aug 27, 2023

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Stackdisplay asked Aug 27, 2023

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6 votes

AS ACD and ACBare congruent triangles, we have that

$\begin{gathered} 3y=21\rightarrow \\ y=(21)/(3)=7 \end{gathered}$

so the answer is y=7

Phil Sheard answered Aug 31, 2023

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