A complete and practical solution book for the common school teacher (1899)
Fairchild, J[ohn] T[heodore] [from old catalog] · Crawfis College, Ohio, The author · leaf 159
(2) EC = V52 and AT = V73. (3) Let 0 repres e n t the square on the half ofBC and ED half thesquare on AB. (4) Also the squares AX, PX and XK are eachequal to ED. (5) Then, if we subtract 0 from either of thesquares ED or XKwe have the gnomonS. (6) As EBC is a right tri- angle, 50+ S = 52 (1). (7)… … FIG. 15. 3. AC = VBC2 + AB2. ABC is a 6, 8 and 10 triangle. V* + S = 4, 10. or PROBLEM 315. There are two ladders standing-]in the middle of a street; one is80 ft., and the other 90 ft., both lean ag-ainst a building- and the 90 ft.ladder reaches the top 20 ft. hig-her than the 80 ft. ladder: find…
Arithmetic · Geometry
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