An illustration of a circle inscribed in a square. It can be used to show that the area of a circle is .7854 of the area of a square whose sides are equal to its diameter.
E. E. White White's New Complete Arithmetic (New York: American Book Company, 1883) 161
2379×2400, 333.5 KiB
1015×1024, 47.1 KiB
634×640, 26.8 KiB
317×320, 12.4 KiB