Appleton's cyclopædia of drawing, designed as a textbook for the mechanic, architect, engineer, and surveyor (1866)
Worthen, William Ezra, 1819-1897, [from old catalog] ed, Appleton, firm, publishers, New York. (1866. D. Appleton & co.) [from old catalog] · New York, D. Appleton and company · leaf 23
straight lines; when thethree sides are equal, the triangle is equilateral; when only two of itssides are equal, isosceles ^ when none equal, scaline; when one of theangles is a right angle, the triangle is right angled^ and then the longestside, or that opposite the right angle is called the… … r\A. 7. Fig. S. Fig. 9. Fig. 10. When llic ojtposito bides are paraUcl, it \f^ ii2Mi(dhlogra7n ; if its angles I OEOMETEICAL DEFINITIONS AND TECHNICALITIES. are riglit angles, it is a rectangle (fig. 7); if the sides are also equal, it is asquare (fig. 8); if all the sides are equal, hut the angles…
