Babendreier, Arthur O. [from old catalog], Maryland institute for the promotion of mechanic arts and design, Baltimore. [from old catalog] · Baltimore, Md., The Maryland institute for the promotion of mechanic arts and design · leaf 60
A-B, B-C,C-A, joined at their endsforms a triangle. Inside the FIG.23 /\ figure (see Fig. 23a) an angle is formed between each sideand the side adjacent to it, or three (tri) angles a, b, c,as the name triangle implies. A triangle consists of sixparts as follows: 3 sides A-B, B-C, C-A and 3 angles… … An angle is defined by the divergence, expressed indegrees, between the two sides forming it. If any line istaken as a radius and caused to make one revolution, itwould describe a circle or would have passed through360 spaces called degrees (°). This is true whether theline be short or long(see…
Mechanics
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