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Bell Work

Bell Work. 20 cups of lemonade. 1. Cole earned a total of $ 12 by selling 16 cups of lemonade. How many cups of lemonade does Cole need to sell in all to earn $15? Use a ratio table or set up a proportion to solve. 300 votes.

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Bell Work

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  1. Bell Work 20 cups of lemonade 1. Cole earned a total of $12 by selling 16 cups of lemonade. How many cups of lemonade does Cole need to sell in all to earn $15? Use a ratio table or set up a proportion to solve. 300 votes 3. The distance between Philadelphia and San Francisco is 2,950 miles. You look on a map and see the scale is 1 inch : 100 miles. What is the distance between the two cities on the map? 2. Mary received 4 votes for every vote that Jane received. 1500 people voted. How many votes did Jane receive? Use a ratio table to solve 29.5 inches

  2. Similar Polygons • Two objects are similar if they are the same shape but different sizes.

  3. Example: Is the pair of polygons similar? Explain your answer. 5 m 8 m 10 m 13 m OR 5(13) = 8(10) 65 = 80 NO 5(13) = 10(8) 65 = 80 NO

  4. Example: Is the pair of polygons similar? Explain your answer. 4 yd 3 yd 4.5 yd 6 yd OR 4(4.5) = 6(3) 18 = 18 YES 4(4.5) = 6(3) 18 = 18 YES

  5. Are the polygons similar? You must be able to justify your answer. (Shapes not drawn to scale.) Yes No 15 ft 9 ft 12 ft 21 ft

  6. Are the polygons similar? You must be able to justify your answer. (Shapes not drawn to scale.) Yes 10 m No 2.5 m 2 m 8 m

  7. Are the polygons similar? You must be able to justify your answer. (Shapes not drawn to scale.) Yes 15 yd No 6 yd 37.5 yd 15 yd

  8. Example: Find the value of x in the pair of similar polygons. x 10 cm 15 cm 6 cm 8 cm OR 15(10) = 6x 150 = 6x 25 cm = x 15(10) = 6x 150 = 6x 25 cm = x

  9. You try: Find the value of y in the pair of similar polygons. 15 in 7.5 in 15(5) = 7.5x 75 = 7.5x 10 in = x 15(5) = 7.5x 75 = 7.5x 10 in = x 5 in Or y

  10. Find the measure of the missing value in the pair of similar polygons. (Shapes not drawn to scale.) 17.5 ft 25 ft 25 ft w 18 ft A 18ft B 450ft C 12.6 ft .07 ft D

  11. Find the measure of the missing value in the pair of similar polygons. (Shapes not drawn to scale.) x 4 m 4.25 m 17 m A 16m B 16.25m C 68ft 18.06ft D

  12. Find the measure of the missing value in the pair of similar polygons. (Shapes not drawn to scale.) y 6 mm 11 mm 38.5 mm A 66mm B 70.58mm C 33.5mm 21 mm D

  13. Scale Factor • When you compare corresponding measurements of proportional objects, you get a ratio. • This ratio is called the scale factor.

  14. Practice: Similar Polygons Worksheet

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