Slice off a section of a cone to create a conic section as usual. Then, cut straight down the side of the cone and unroll it so becomes a flat sector of a disc. What shape does the conic section become?
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Slice off a section of a cone to create a conic section as usual. Then, cut straight down the side of the cone and unroll it so becomes a flat sector of a disc. What shape does the conic section become?
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