12. A solid is that which has length, breadth,and thickness, as n. … 13. An angle is the inclination of two lines,A B, B c, which meet in a point b, called thevertex, or angular point; and the two lines a b,B c, are called the legs or sides of the angle b.A ^_ Obs.—When several lines proceed from the same point,forming different angles, it is necessary to make use…
Design · Decoration and ornament · Art
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