1. Geometry
Chapter 7 section 1

2. Proportions
2 ratios that are equal

3. Ratio
A way to compare 2 values by putting one value in the numerator and one in the denominator

4. Scale
An equivalent ratio with one in the denominator

5. Means and Extremes

6. Cross Product
If 2 ratios are proportional, the product of the means is equal to the product of the extremes

7. Is this a proportion?

8. Proportional Equations

9. Proportional Equations

10. Proportional Equations

11. Proportional Equations

12. Proportional Equations with 3

13. Proportional Equations with 3

14. Proportional Figures ΔABC has sides proportional to ΔDEF
AB = 20 DE = 12
BC = 15 DF = x
AC = 25
Find x if DE is the smallest side & DF is the largest

15. Do Now
Page 324
Problems 21 – 42, 45,