haley53 haley53
  • 15-11-2016
  • Mathematics
contestada

find EF in the trapezoid

find EF in the trapezoid class=

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bartdrinksmalk
bartdrinksmalk bartdrinksmalk
  • 15-11-2016
EF is halfway between AD and BC.

Using the midpoint formula:
[tex]4x=\frac{(x+6)+57}{2}[/tex]
⇒[tex]4x=\frac{x+63}{2}[/tex]
⇒[tex]8x=x+63[/tex]
⇒[tex]7x=63[/tex]
⇒[tex]x=9[/tex]

EF is [tex]4x=4(9)=36[/tex]
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