a fireplace arch is to be constructed in the form of a semiellipse. the opening is to have a height of 1 foot at the center and a width of 6 feet along the base. the contractor cuts a string of a certain length and nails each end of the string at the foci of the base in order to sketch the outline of the semiellipse.
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a fireplace arch is to be constructed in the form of a semiellipse. the opening is to have a height...
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