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Mathematics 8 Online
OpenStudy (here_to_help15):

Geometry Help? FAN N MEDAL

OpenStudy (here_to_help15):

OpenStudy (here_to_help15):

@eliassaab

OpenStudy (ageta):

it is going to be 30

OpenStudy (mathmath333):

its should be 60

OpenStudy (here_to_help15):

Um who is right?

OpenStudy (mathmath333):

|dw:1418079710168:dw|

OpenStudy (mathmath333):

\(\large\tt \begin{align} \color{black}{\triangle ADE\approx \triangle ABC\\~\\ \text{hence}\\~\\ \dfrac{ad}{ab}=\dfrac{de}{bc}\\~\\ \color{red}{\text{ad=db , ab=ad+db=2ad}}\\~\\ \dfrac{ad}{2ad}=\dfrac{de}{120}\\~\\ \dfrac{1}{2}=\dfrac{de}{120}\\~\\ de=\dfrac{120}{2}\\de =60 }\end{align}\)

OpenStudy (here_to_help15):

Thanks @mathmath333

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