ne day a teacher took his class of sixth graders outside and challenged them to find the distance between two rocks that could easily be​ seen, one above the​ other, on the vertical face of a bluff near the school. After some​ discussion, the children decided to hold a rod in a vertical position at a point 104' from the base of the​ cliff, as shown in the accompanying figure. They also decided to mark the points on the rod where the lines of sight of a student standing 4' farther from the cliff and looking at the rocks cut the rod. If the marks on the rod were 25'' ​apart, what was the distance between the two​ rocks? (see photo

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