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 261
nd with G and L as centers, will be tangentto circles O and 0, respectively. Prove GL parallel to AB. 3. Let AN = NM = MB. Draw NH and MK perpendicular toAB from points iV and Af, respectively, meeting GL at H and K.Complete the construction of arches GEH and KFL. 4. If arc HD is tangent to line NH… … Fig. 226.— From Milan Catliedral. 270. In Fig. 226 the center of the large central circle is probably arbitrary.The two small side arches are constructed with one third of the main span asradius and with one side of each tangent to the circle. The small central archis equilateral and made to touch…
Geometry · Decoration and ornament
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