Davies, Charles, 1798-1876 · New York and Chicago, A. S. Barnes and company · leaf 63
n the length of one of theequal sides, and one of the angles. Let AB be equal to the given side,and E the given angle. At B lay off an angle, ABC, equalto E, by Prob. VIII. and make BCequal to AB. Then, with A and Cas centres, and a radius equal to AB, ^ & describe two arcs. Through D, their… … BOOK II fi3 Problems. angle B is equal to the angle E: hence, ABCD is the re-quired rhombus. PROBLEM xv.To find the centre of a circle Draw any chord, as AB, and bisect itby Problem IV. Then, through F, themiddle point, draw DCE, perpendicularto AB, by Problem VI. Then DCEwill be a diameter of the…
Geometry · Plane trigonometry
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