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Lesson 6-2 Pages 270-274. Using Proportions. Lesson Check 6-1. What you will learn!. How to solve proportions. How to use proportions to solve real-world problems. Vocabulary. What you really need to know!. A proportion is an equation stating that two ratios are equal.

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## Lesson 6-2 Pages 270-274

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**Lesson 6-2Pages 270-274**Using Proportions Lesson Check 6-1**What you will learn!**• How to solve proportions. • How to use proportions to solve real-world problems.**What you really need to know!**A proportion is an equation stating that two ratios are equal.**What you really need to know!**You can use cross products to solve a proportion.**Example 1:**Determine whether the pair of ratios form a proportion.**?**No! 2 x 20 = 40 3 x 12 = 36**Example 2:**Determine whether the pair of ratios form a proportion.**?**Yes! 0.8 x 8 = 6.4 2 x 3.2 = 6.4**Example 3:**Solve each proportion.**c = 21.6**15c = 36•9 15c = 324**Example 4:**Solve each proportion.**v = 5**4.8v = 16•1.5 4.8v = 24**Example 5:**An architect builds a model of a building before the actual building is built. The model is 8 inches tall and the actual building will be 22 feet tall. The model is 20 inches wide. Find the width of the actual building.**8•n = 22•20**8n = 440 n = 55 feet**Example 6:**The Circleville Pumpkin Show in Circleville, Ohio, boasts the world’s largest pumpkin pie. The pie weighs 350 pounds and is 5 feet in diameter. Find the diameter of the pie in centimeters if 1ft = 30.48 cm.**1•n = 30.48•5**1n = 152.4 n = 152.4 cm**Page 272**Guided Practice #’s 3-8**Read:**Pages 270-272 with someone at home and study examples!**Homework: Pages 273-274**#’s 10-42 even #’s 45-55 Lesson Check 6-2**Page**737 Lesson 6-2

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