An Encyclopædia of Architecture: Historical, Theoretical, and PracticalLongman, Brown, Green, and Longmans, 1842 - 1089 Seiten |
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Seite 326
... plane . 2. A right line is perpendicular to a plane if it make right angles with all lines which can be drawn from any point in that plane . Thus BA ( fig . 322. ) is perpendicular to the plane MLGFPN , because it makes right angles ...
... plane . 2. A right line is perpendicular to a plane if it make right angles with all lines which can be drawn from any point in that plane . Thus BA ( fig . 322. ) is perpendicular to the plane MLGFPN , because it makes right angles ...
Seite 327
... plane : and the line AB will be perpendi- cular to the plane MLG FPN , because it will make right angles with the lines AM , AL , AG , & c . drawn from the point A in that plane . 6. Two planes are parallel when all perpendiculars drawn ...
... plane : and the line AB will be perpendi- cular to the plane MLG FPN , because it will make right angles with the lines AM , AL , AG , & c . drawn from the point A in that plane . 6. Two planes are parallel when all perpendiculars drawn ...
Seite 328
... plane ( Defin . 2. ) must pass through the points C , D ; it would therefore ( Prop . 93. ) be the same with the plane FDCG , since these two planes would have three common points i A , C , D. 975. PROP . XCV . From a given point in a plane ...
... plane ( Defin . 2. ) must pass through the points C , D ; it would therefore ( Prop . 93. ) be the same with the plane FDCG , since these two planes would have three common points i A , C , D. 975. PROP . XCV . From a given point in a plane ...
Seite 329
... plane surfaces . 3. A prism is a solid terminated by two identical plane bases parallel to each other , and by surfaces which are parallelo- grams . ( Fig . 334. ) 4. A parallelopiped is a prism the bases of which are parallelo- grams ...
... plane surfaces . 3. A prism is a solid terminated by two identical plane bases parallel to each other , and by surfaces which are parallelo- grams . ( Fig . 334. ) 4. A parallelopiped is a prism the bases of which are parallelo- grams ...
Seite 331
... plane cd : whence the triangles Abc , ABC , having the angles b , B right angles , and the angle A common , are ... plane CD : the plane cd is to the plane the height Ab is to the square of the height AB . The line AB , being ...
... plane cd : whence the triangles Abc , ABC , having the angles b , B right angles , and the angle A common , are ... plane CD : the plane cd is to the plane the height Ab is to the square of the height AB . The line AB , being ...
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