Geometrical Drawing With Notes And Examples
Geometrical Drawing With Notes And Examples
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In our eReader you can find the full English version of the book. Read Geometrical Drawing With Notes And Examples Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Geometrical Drawing With Notes And Examples
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To quickly assess the difficulty of the text, read a short excerpt:
128 PLANE GEOMETRICAL DRAWING.
The Protractor, In the Introduction will be found a figure shewing the use of the protractor to measure angles up to i8o° : in the Chapter on Scales, the use of the diagonal scale: and (m), (112) shew how to obtain an angle from the scale of chords. On some pro- tractors angles are given up to 360°.
Draw a vertical straight line SON, the upper end being marked N, the lower S, and O being about midway between N and S.
If the edge of the protractor be laid along NS ...with the arrow at O, the protractor being to the right of NS, the angles measure from N round to S up to 180°. Now lay the protractor on the left of the line NS, the arrow at O and its edge along NS, on this side use the scale from 180° to 360°. The reason for doing so is this, in using the compass to observe angles we take a line drawn to the north (N) and measure angles eastwards right round to the south (S) and still in the same direction up to north again. It is necessary to use angles from 180° to 360'' to distinguish west from east.
What to read after Geometrical Drawing With Notes And Examples?
You can find similar books in the "Read Also" column, or choose other free books by W H William Henry Blythe to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
128 PLANE GEOMETRICAL DRAWING.
The Protractor, In the Introduction will be found a figure shewing the use of the protractor to measure angles up to i8o° : in the Chapter on Scales, the use of the diagonal scale: and (m), (112) shew how to obtain an angle from the scale of chords. On some pro- tractors angles are given up to 360°.
Draw a vertical straight line SON, the upper end being marked N, the lower S, and O being about midway between N and S.
If the edge of the protractor be laid along NS ...with the arrow at O, the protractor being to the right of NS, the angles measure from N round to S up to 180°. Now lay the protractor on the left of the line NS, the arrow at O and its edge along NS, on this side use the scale from 180° to 360°. The reason for doing so is this, in using the compass to observe angles we take a line drawn to the north (N) and measure angles eastwards right round to the south (S) and still in the same direction up to north again. It is necessary to use angles from 180° to 360'' to distinguish west from east.
What to read after Geometrical Drawing With Notes And Examples?
You can find similar books in the "Read Also" column, or choose other free books by W H William Henry Blythe to read onlineMoreLess
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