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Architectural drawing : a textbook that combines the parctical instructions and examples that the student needs, with the suggestive programs, supplementary problems, etc, required by the teacher, written by an architect of wide experience who has also taught the subject for years at Teachers' College, Columbia University, and Mechanics' Institute, New York (1920)

Teale, Oscar S · New York : U.P.C. Book · leaf 21

An illustration from Architectural drawing : a textbook that combines the parctical instructions and examples that the student needs, with the suggestive programs, supplementary problems, etc, required by the teacher, written by an architect of wide experience who has also taught the subject for years at Teachers' College, Columbia University, and Mechanics' Institute, New York, 1920, leaf 21
These two instruments are also called Right AngleTriangles, (The 90° angle of each being the rightangle.) 18 ARCHITECTURAL DRAWING By sliding the set-square along the blade ofT-square, a great many lines at an angle of 45° maybe made in the length of the T-square blade, and thelines may be drawn to… … FIG. 10. U FIG.11. Lines at an angle of 30° with a horizontal line aremade as shown in Fig. 8, and at an angle of 45°, 30°,60° and 90° with any other line other than horizontal,thus:

Architectural drawing

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