1. 6.1 Ratios, Proportions, & Geometric Mean November 11, 2011
6.1 Ratios, Proportions & Geometric Mean
Ratio of a to b: a/b or a:b
2m 2m
1m 1m 2/1 or 2:1
2m 1m
Equivalent Ratio: same simplified form Ratio= 7/14 or 1:2
7 ft
14 ft
HW pg. 360 #6­36 evens, 49­51 1

2. 6.1 Ratios, Proportions, & Geometric Mean November 11, 2011
HW pg. 360 #6­36 evens, 49­51 2

3. 6.1 Ratios, Proportions, & Geometric Mean November 11, 2011
HW pg. 360 #6­36 evens, 49­51 3

4. 6.1 Ratios, Proportions, & Geometric Mean November 11, 2011
extreme a c mean
Proportions: 2 ratios that are equal -=-
mean b d extreme
Cross Multiply: 2 = 4
- - 2 * 6 = 12
3 6 3 * 4 = 12
HW pg. 360 #6­36 evens, 49­51 4

5. 6.1 Ratios, Proportions, & Geometric Mean November 11, 2011
HW pg. 360 #6­36 evens, 49­51 5

6. 6.1 Ratios, Proportions, & Geometric Mean November 11, 2011
Geometric Mean: x2 = ab or x = √ab
HW pg. 360 #6­36 evens, 49­51 6

7. 6.1 Ratios, Proportions, & Geometric Mean November 11, 2011
0 -51
36 49
g. s,
: p ven
rk e
wo 36
me 6-
Ho
#
HW pg. 360 #6­36 evens, 49­51 7