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IF a straight line be drawn parallel to one of the sides of a triangle, it shall cut the other sides, or those produced, proportionally ; and if the sides, or the sides produced, be cut proportionally, the straight line which joins the points of section...

The figures of Euclid with the enunciations, as printed in Euclid's Elements ... - Page 54
by Euclides - 1840
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University of St. Andrews - 1896

...the weight supported is 17 Ib. 12. To find the position of the centre of gravity of a plane triangle. If a straight line be drawn parallel to one of the sides of a triangle so as to cut off one-fourth of its area, find the centre of gravity of the quadrilateral remaining....

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