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OpenStudy (anonymous):
The diagram shows a section of a bridge between points A and K. The length of AK¯¯¯¯¯ is 640 meters. ΔABC, ΔCDF, and ΔFJK are similar, and 2AC = CF = 2FK. If the first pillar, BG¯¯¯¯¯, is 20 meters tall, what is the area of ΔCDF?
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