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I dont understand how to do this. Please show steps

 Jul 16, 2020
 #1
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I dont understand how to do this. Please show steps

EC=

\(\text{Let $ES=ER=30$} \\ \text{Let $DT=DR=17$} \\ \text{Let $TC=SC=32$} \\ \text{Let the perimeter is $c+d+e$} \)

 

\(\begin{array}{|rcll|} \hline c+d+e &=& 2*17+2*30+2*32 \\ \mathbf{c+d+e} &=& \mathbf{158} \\ \hline \end{array}\)

 

The perimeter of \(\triangle DEC\) is \(\mathbf{158}\)

 

laugh

 Jul 16, 2020

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