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Mathematics 20 Online
OpenStudy (anonymous):

help

OpenStudy (anonymous):

|dw:1441301366402:dw| given that : line AB=8 line BD=9 line DE=13 line BC=X what is the value of X

Nnesha (nnesha):

hmm both triangles are similar so you can set teh proportion \[\huge\rm \frac{ height }{ base }=\frac{ height }{ base }\]

OpenStudy (anonymous):

soo 13/9=x/8

Nnesha (nnesha):

|dw:1441301759326:dw| AD is base of big triangle

Nnesha (nnesha):

AB+BD would be base of big triangle

OpenStudy (anonymous):

soo x/8=13/9

Nnesha (nnesha):

AB= ?? BD= ?? add both length that would be base

OpenStudy (anonymous):

im lost

Nnesha (nnesha):

\(\color{blue}{\text{Originally Posted by}}\) @jamesr given that : line AB=8 line BD=9 line DE=13 line BC=X what is the value of X \(\color{blue}{\text{End of Quote}}\) AB =what BD= what ?

OpenStudy (anonymous):

8 and 9

Nnesha (nnesha):

AD is length not jsut BD

Nnesha (nnesha):

yes right that would be base of big triangle AB+BD 8+9= base

Nnesha (nnesha):

so it's \[\frac{ 13 }{ 8+9}=\frac{ x }{ 8}\]

OpenStudy (anonymous):

104/17

Nnesha (nnesha):

yep

Nnesha (nnesha):

divide that

OpenStudy (anonymous):

6.117647059

Nnesha (nnesha):

looks good so x is what ?

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