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 160
Tile Pattern. D L K a W ^ iX H ■--■5^ ^tt r-- N ^ ^ a F a ^ __eje*] MEASUREMENT OF LINE-SEGMENTS. 147 5. If a side of a regular octagon is a, find its area. 6. A floor is tiled with regular whiteoctagons and black squares as shown inthe design. What per cent (approxi-mately) of the floor is black?…
Geometry, Plane
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