A text book of elementary mechanics, for the use of colleges and schools (1881)
Dana, Edward Salisbury, 1849-1935 · New York, J. Wiley & sons · leaf 193
g. 100) EFand HE joining the middle points of the oppositesides. 166. Centre of Gravity of a Triangle. {\The centre ofgravity of any triangle is onthe line drawn from either ver-tex to the middle point of theopposite side, and one third ofthe distance from this side, j Let A BO be a triangle… … bd dc id BD BD ~ DO or dc ~ DC But, by construction, BD — DC) hence bd = dc, and thecentre of gravity of the line bo is at d, on the line AD.Therefore it follows that the centre of gravity of all thematerial lines parallel to BO, of which the triangle maybe considered as made up, lies in AD, and…
Mechanics
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