anonymous
  • anonymous
Prove that a line that divides two sides of a triangle proportionally is parallel to the third side. Be sure to create and name the appropriate geometric figures.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
@ganeshie8 @GJGJGJ @aaronq @thomaster can some help :)
anonymous
  • anonymous
@UnkleRhaukus @experimentX @skullpatrol help plz?
dan815
  • dan815
|dw:1378562890103:dw|

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dan815
  • dan815
|dw:1378562911547:dw|
dan815
  • dan815
if you apply cos law
dan815
  • dan815
you will see that side AC and DE are also proportional making them similar triangles
dan815
  • dan815
|dw:1378563022502:dw|
anonymous
  • anonymous
dont get it :/
phi
  • phi
I would prove the triangle ABC is similar to triangle ADE then you have a transversal (line AB) crossing lines AC and DE with corresponding angles = which means you have parallel lines AC and DE
anonymous
  • anonymous
so im going to write in the answer what s written in the picture?
anonymous
  • anonymous
so i should write line ab=line db and line cb= line eb and line ac square=line cb square + line ab-line 2cb and line ab and line de square = line cb over 2 bracket square +ab over 2 bracket square -2line cb over2 and line ad over 2 so line de square=line ac square DC = ac over 2
anonymous
  • anonymous
THANK YOU so much btw :)
dan815
  • dan815
lol your display picture is jokes
anonymous
  • anonymous
?what

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