1 / 28

Lesson 6-2 Pages 270-274

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.

gavan
Télécharger la présentation

Lesson 6-2 Pages 270-274

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Lesson 6-2Pages 270-274 Using Proportions Lesson Check 6-1

  2. What you will learn! • How to solve proportions. • How to use proportions to solve real-world problems.

  3. Vocabulary

  4. What you really need to know! A proportion is an equation stating that two ratios are equal.

  5. What you really need to know! You can use cross products to solve a proportion.

  6. Example 1: Determine whether the pair of ratios form a proportion.

  7. ? No! 2 x 20 = 40 3 x 12 = 36

  8. Example 2: Determine whether the pair of ratios form a proportion.

  9. ? Yes! 0.8 x 8 = 6.4 2 x 3.2 = 6.4

  10. Example 3: Solve each proportion.

  11. c = 21.6 15c = 36•9 15c = 324

  12. Example 4: Solve each proportion.

  13. v = 5 4.8v = 16•1.5 4.8v = 24

  14. 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.

  15. 8•n = 22•20 8n = 440 n = 55 feet

  16. 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.

  17. 1•n = 30.48•5 1n = 152.4 n = 152.4 cm

  18. Page 272 Guided Practice #’s 3-8

  19. Read: Pages 270-272 with someone at home and study examples!

  20. Homework: Pages 273-274 #’s 10-42 even #’s 45-55 Lesson Check 6-2

  21. Page 737 Lesson 6-2

  22. Lesson Check 6-2

More Related