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 150
8Fig. I2lc. 18. Construct the f star and study its composition. 19. Construct the t star and show that it is composed of two 20. If the circumference is divided into 16 equal parts, how many16-pointed stars can be constructed? 21. Construct the ^^j and j^j stars. Study the composition of each.… … EXERCISES151. 1. Construct the regular ^ star.Suggestion. — See Fig. 122. 2. Give the axes of symmetry of this figure. 3. Prove that (a) AE=EB = BF = FC, etc.(A) AQ= QC = BR = ED, etc.(c) AW= WD = BX = XA, etc. 138 MISCELLANEOUS INDUSTBIES t 4. Prove that (a) ZA=ZB = ^C, etc.(J) ZAEB =Z BFC = ZCGD,…
Geometry · Decoration and ornament
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