Sullivan, Christine [Gordon]. [from old catalog] · New York, Cincinnati [etc.] American book company · leaf 18
ine connecting the extrem-ities of an arc. 60. A segment is the space included between the chord and its arc. 61. An angle at the center is measured by an arc at the circumfer-ence between the sides of the angle. Thisarc is said to subtend the angle. 62. An angle whose vertex is in the… … Fig. 18.
Mechanical drawing
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