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Sections 3.6 & 3.7

Sections 3.6 & 3.7. Solve Proportions Using Cross Products Solve Percent Problems. Scale Drawings and Scale Models. A scale drawing is a two-dimensional drawing of an object in which the dimensions of the drawing are in proportion to the dimensions of the object. Scale Drawing = 2d.

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Sections 3.6 & 3.7

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  1. Sections 3.6 & 3.7 Solve Proportions Using Cross Products Solve Percent Problems

  2. Scale Drawings and Scale Models A scale drawing is a two-dimensional drawing of an object in which the dimensions of the drawing are in proportion to the dimensions of the object. Scale Drawing = 2d A scale model is a three-dimensional model of an object in which the dimensions of the model are in proportion to the dimensions of the object. Scale Model= 3d

  3. Example # 1

  4. Example # 2

  5. Example # 3

  6. Example # 4

  7. 3 Forms of Percent Problems

  8. x 25 = 17 * What percent of 25 is 17 25x = 17 25 25 x = .68 68% 68 percent of 25 is 17

  9. x .15 88 = * What number is 15% of 88 X=.15*88 X= 13.2 13.2 is 15% of 88

  10. .125 x 20 = * 20 is 12.5% of what number 20=.125x .125 .125 160 = x 20 is 12.5% of 160

  11. Homework Pg 171 #’s 1-30 Pg 179-180 #’s 1-30

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