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2010 AMC 12A Question 17

AMC12 · 2010 AMC 12A

Question 17

Equiangular hexagon $ABCDEF$ has side lengths $$
AB=CD=EF=1
$$ and $$
BC=DE=FA=r.
$$ The area of $\triangle ACE$ is $70\%$ of the area of the hexagon. What is the sum of all possible values of $r?$
  1. $\dfrac{4\sqrt{3}}{3}$
  2. $ \dfrac{10}{3}$
  3. $4$
  4. $\dfrac{17}{4}$
  5. $6$