| Research & Education Association Editors, Ernest Woodward - Mathematics - 2012 - 1080 pages
...angles. 10. AA = AA 11. Corresponding sides of similar triangles are in proportion. 12. In a proportion, **the product of the means is equal to the product of the extremes.** • PROBLEM 531 Using Ptolemy's Theorem show that if a anS b, with a ^ b, are chords of two arcs of... | |
| Ann Faber, Gale Edgerton, Paul Karanevich - Mathematics - 1985 - 254 pages
...proportion amounts to multiplying the "means" (inner numbers) and the "extremes" (outer numbers). If **the product of the means is equal to the product of the extremes,** the ratios are equal. 2X2 = 4 1:2 2:4 1 X4 = 4 4 = 4, so that 1 :2 = 2:4 is a proportion. I Example... | |
| The Editors of REA - Mathematics - 2013 - 112 pages
...the means of the proportion. The single term d is called the fourth proportional. In a proportion, **the product of the means is equal to the product of the extremes.** Theorem 2 A proportion may be written by inversion. (If alb = eld, then bla = die.) Theorem 3 •i... | |
| Joanne K. Price - Technology & Engineering - 1991 - 378 pages
...proportion. The inside terms (2nd and 3rd) are called the means of a proportion. For all proportions, **the product of the means is equal to the product of the extremes.** In other words, when the two inside terms are multiplied, the answer will be the same as when the two... | |
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