7.2 Writing and Solving Proportions Day 2
Essential  Questions <ul><li>What is the connection between a ratio and a fraction? </li></ul><ul><li>Why are ratios and p...
<ul><li>A scale drawing shows the shape of an object but not the actual size.  A scale give the ratio of the measurements ...
<ul><li>A map states that 1 in  = 50 miles.  If the distance on the map between two cites is 2.8 inches, how far actually ...
<ul><li>Lady bugs average 0.4 inches in length.  A scale drawing of a ladybug will be made using a scale of 10:1 (model to...
Similar Polygons <ul><li>Similar polygons  have the same shape but not necessarily the same size.  They are, however,  pro...
<ul><li>Find the missing length using proportions </li></ul>30 45 25 n
Find the missing side 15 37.5 30 y
Homework <ul><li>Page 351 #25-28, 39-41, 43A </li></ul>
Upcoming SlideShare
Loading in …5
×

7.2 writing and solving proportions 2

391 views

Published on

Published in: Education, Business
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
391
On SlideShare
0
From Embeds
0
Number of Embeds
24
Actions
Shares
0
Downloads
4
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

7.2 writing and solving proportions 2

  1. 1. 7.2 Writing and Solving Proportions Day 2
  2. 2. Essential Questions <ul><li>What is the connection between a ratio and a fraction? </li></ul><ul><li>Why are ratios and proportions important? </li></ul><ul><li>How are scale drawings, models, and proportions used in everyday life? </li></ul>
  3. 3. <ul><li>A scale drawing shows the shape of an object but not the actual size. A scale give the ratio of the measurements in the drawing – such as 1:10 scale. </li></ul><ul><li>This might mean “scale to actual” is 1 to 10 or the actual object is 10 times larger. </li></ul>
  4. 4. <ul><li>A map states that 1 in = 50 miles. If the distance on the map between two cites is 2.8 inches, how far actually are the two cities apart? </li></ul><ul><li>Scale </li></ul><ul><li>Actual </li></ul>
  5. 5. <ul><li>Lady bugs average 0.4 inches in length. A scale drawing of a ladybug will be made using a scale of 10:1 (model to actual). What will the length of the ladybug be in the drawing? </li></ul><ul><li>Scale </li></ul><ul><li>Actual </li></ul>
  6. 6. Similar Polygons <ul><li>Similar polygons have the same shape but not necessarily the same size. They are, however, proportional. </li></ul>
  7. 7. <ul><li>Find the missing length using proportions </li></ul>30 45 25 n
  8. 8. Find the missing side 15 37.5 30 y
  9. 9. Homework <ul><li>Page 351 #25-28, 39-41, 43A </li></ul>

×