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Unformatted text preview: • a and d are the extremes d c b a = Properties of Proportions • Cross product propertymeans=extremes 1. If then, ad=bc • Reciprocal Property(both ratios must be flipped) 2. If , then d c b a = d c b a = c d a b = Example 10(s5)=4s 10s50=4s50= 6s 10 4 5 s s =s = 3 25 The ratios of the side lengths of ∆ QRS to the corresponding side lengths of ∆ VTU are 3:2. Find the unknown length. Q R S X y V u T 18cm 2cm z w Example cont 333 = y 148 = z 2 3 2 = x x= 3cm a 2 +b 2 =c 2 3 2 +18 2 =y 2 9+324=y 2 333=y 2 y ≈ 18.25cm 2 2 +12 2 =z 2 4+144=z 2 148=z 2 z ≈ 12.17cm 2 3 18 = w w= 12cm Assignment Assignment...
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 Spring '08
 GERMAN
 Ratios, Ratio, 3 ft, 1 ft, 3cm, 2cm, 1 yd

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