Advanced geometry for high schools : synthetic and analytical (1919)
McDougall, A. H. (Alexander Hiram), 1859-1946 · Toronto : Copp, Clark · leaf 150
an Z of 45° with * + | = 1. 16. Show that the equation of the st. line through (a, b)and making an Z of 60° with x cos a + y sin a = p isy — b = {x - a) tan (u ± 30°). 17. Show that the right bisectors of the sides of the A(0, 0), (a, 0), (b, c) are concurrent; and find their point ofintersection.… … Draw PM _L the given st. line. Join P to N, Rthe points where the given st. line cuts Ox, Oy.A PRN =1PM. RN. ON = — ^ and OR = - RN B2. By the formula of § 17 A = - 2Xi(Ari + B^ + c>- •• i PM • ?b\/A2+ B = 2a¥ (a*> + B^ + c>A^ + By, + c ;. PM = - The length of the _]_ is .. axx + Byx +…
Geometry · Geometry, Analytic
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