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 200
A s B 47. The middle points, A,B, C, D,of alternate sides of a regular octagonare joined as shown in the figure.AH\i perpendicular to ^S and equalto it. BG, CK, and DL are con-structed in the same manner. (a) Prove that ABCD and HGKLare squares. (ft) Find the areas of ABCD and HGKL, if Si^= 10…
Geometry, Plane
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