Detroit. Public schools. Dept. of instruction, teacher training and research. [from old catalog], Kepler, Frank Roy. [from old catalog] · Detroit · leaf 20
\a1 … r/G. a a r/G. a3 To determine elements on the surface of a cylinder:—Aplane passed through a cylinder so as to contain the axis willintersect the surface in two straight lines parallel to the axis.Since these two lines are parallel to the axis and therefore toeach other, they are right line…
Projection
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