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Chapter 7 : Similar Polygons

Chapter 7 : Similar Polygons. Standard 2: Students identify and describe polygons, and measure interior and exterior angles. They use congruence, similarity, symmetry, tessellations, and transformations. Lesson 7.1. Ratio and Proportion. Ratio. A ratio is a comparison of 2 quantities.

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Chapter 7 : Similar Polygons

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  1. Chapter 7: Similar Polygons Standard 2: Students identify and describe polygons, and measure interior and exterior angles. They use congruence, similarity, symmetry, tessellations, and transformations.

  2. Lesson 7.1 Ratio and Proportion

  3. Ratio • A ratio is a comparison of 2 quantities. • This can be written as: • a : b

  4. Example 1 A small box of chocolate candies has 3 types of chocolates in it. There are 3 pink goobers, 3 vanilla wonders, and 6 chunker crunchers. Find the ratio of chunker crunchers to pieces of candy in the box.

  5. Example 2 The ratio of the measures of the three angles in a triangle is 2:3:5. What are the measures of each angle?

  6. Example 3 The ratio of the measures of the three sides in a triangle is 3:4:6, with a perimeter of 104 feet. What are the measures of each side?

  7. Example 4 The ratio of males students to female students is 2:3. If there are 18 female students in the class, how many male students are there?

  8. Solving proportions

  9. Solving proportions

  10. Get a marker board

  11. Solve all 4 proportions!

  12. Assignment p. 460: 12 - 28

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