SOLUTION: What is the approximate length?

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Question 1011584: What is the approximate length?
Found 2 solutions by josgarithmetic, Freezie:
Answer by josgarithmetic(39799) About Me  (Show Source):
You can put this solution on YOUR website!
Small upper triangle and the main triangle are similar.

highlight_green%28AD%2FAB=ED%2FCB%29

ED and CB are given, but AD is only given as cartesian coordinates.

sqrt%28%284-1%29%5E2%2B%28-3-%28-1%29%29%5E2%29%2FAB=3%2F9

Simplify and solve for AB.

Answer by Freezie(16) About Me  (Show Source):