**TI83F* AppVariable file 03/21/07, 14:48  GLGE07 nav 9AE51D1EC13445C5B24A00CF0B737DCFGLGE07.GLGE071  cross products¦cross products:ÖThe product of the terms on the diagonals when two ratios are compared.ÖExample:ÖIn the proportionÖ2/3 = 8/12 the cross products are 2 12 andÖ3 8. extremesAextremes:ÖIn the proportion Öa/b = c/d, a and d are the extremes. means;means:ÖIn the proportion Öa/b = c/d, b and c are the means.  midsegmentWmidsegment:ÖA segment with endpoints that are the midpoints of two sides of a triangle.  proportionUproportion:ÖAn equation of the form a/b = c/d stating that two ratios are equivalent. ratio/ratio:ÖA comparison of two numbers by division.  scale factor:scale factor:ÖA scale written as a ratio in simplest form.†ý