Text-book of geometry
✍
G. A. Wentworth
📂
Library
📅
2010
🏛
Forgotten Books
🌐
English
⚖ 6 MB
GEOMETRY. --- DEFINITIONS. 1. If a block of wood or stone be cut in the sbape represented iu Fjg. 1, it will have six fiat faces. Each face of the block is called a surface; and if these faces are made smooth by polishing, so that, when a straight-edge is applied to any one of them, the straight edg