Question

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!

Answer 1

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