Advanced geometry for high schools : synthetic and analytical (1919)
McDougall, A. H. (Alexander Hiram), 1859-1946 · Toronto : Copp, Clark · leaf 47
a side of aregular decagon inscribed in thecircle; and that AC is a side ofa regular pentagon inscribed inthe circle. J6J In a given circle inscribe a regular pentagon. At theangular points of the pentagon draw tangents meeting atA, B, C, D, E. Show that ABODE is a regular pentagoncircumscribed… … EXERCISES 35 10. ABCDE is a regular pentagon. Show that AC, BD,divide each other in medial section. 11. Construct a regular 5-pointed star. What is themeasure of the Z at each vertex? 0) 12. Show that the side of a regular decagon inscribed in f a circle of radius r is — (]/5 - 1). 13. Show that…
Geometry · Geometry, Analytic
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