Plane geometry, with problems and applications (1910)
Slaught, H. E. (Herbert Ellsworth), 1861-1937, Lennes, N. J. (Nels Johann), 1874- joint author · Boston, Allyn and Bacon · leaf 261
A P M H D E B … From Westminster Abbey. 19. In the figure ABC is an equilateral triangle. On the equalbases PM, MD, DE equilateral arches are constructed, two of themtangent to the sides of the triangle at L and N respectively. Circles0 and 0 are each tangent to a side of the triangle and to two ofthe arches.…
Geometry, Plane
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