A source book of problems for geometry, based upon industrial design and architectural ornament (1912)
Sykes, Mabel, 1868-, Slaught, H. E. (Herbert Ellsworth), 1861-1937, Lennes, N. J. (Nels Johann), 1874- · Boston, Allyn and Bacon · leaf 235
- a;2 = 256. 4. If KA = ks and AB = s, find the length of DO. . sfik-l\Ans. - —; . Suggestion. — Get the equation (is — xy — x^ = (ks — isy. 222 GOTHIC TRACERT: POINTED FORMS 5. If ^ = 2:1, show that DO = ^ KA. Suggestion. — If ^ = 2^, Z PKD = 60°, Z DPK = 30°, Z DKO= 30°. ^ 4 R6.…
Geometry · Decoration and ornament
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