A treatise on special or elementary geometry (1877)
Olney, Edward, 1827-1887, Olney, Edward, 1827-1887. Elements of trigonometry, plane and spherical · New York : Sheldon · leaf 30
r;an acute, a «/i«rp corner; and an obtuse angle mightbe called a blunt corner. In Fig. 11, BAG andDAB are right angles. In Fig. 10, 1, 2, 3, 5, 8, 9,and 10 are acute angles, 4 and 6 are obtuse, and 7 isa right angle. AFig. A SOLID. 27* A Solid is a limited portion of space. It may also be… … fingers a moment, and fix your mindupon it . Now take the block away andthink of the space (place) where it was.This space will be of just the same formas the block of wood, and by a little ef-fort you can think of it just as well as ofthe wood. This space is an example ofwhat we call a Solid in…
Geometry · Trigonometry
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
