Ames, William L. (William Lewis), 1855-, Wischmeyer, Carl · New York, McGraw-Hill book company, inc.; [etc., etc.] · leaf 70
Fig. 114. … angle of 45° with H. A is perpendicular to the plane CB- Whatangle does C make with H (Fig. 114)? 230. Find the traces of the plane which contains point o and isperpendicular to planes S and 4 (Fig. 115).
Geometry, Descriptive
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