Text-book of Euclid's elements for the use of schools : books I - VI and XI (1900)
Hall, H. S. (Henry Sinclair), 1848-1934, Stevens, F. H. (Frederick Haller), 1853-1933 · MacMillan : London · leaf 434
l planes are Buoh as do not meet when pro (lured. 9. A straight line is parallel to a plane if it does notmeet the plane when produced. 10. The angle between two straight lines which do notmeet is the angle contained by two intersecting straight linesrespectively parallel to the two… … 11. A solid angle is that which is made by three ormore plane angles which have a common vertex, but arenot in the same plane. A solid angle made by threeplane angles is said to be trihedral;if made by more than three, it issaid to be polyhedral. A solid angle is sometimes calleda corner.
Geometry · Mathematics
Internet Archive · UBC Library · Public Domain Mark 1.0. Free to use for anything.
