# 3 ­ 8 Square Roots 3­8 square roots web.notebook January 03, 2011 1

```3&shy;8 square roots web.notebook
3 &shy; 8 Square Roots
January 03, 2011
The number a is a square root of b if a2 = b
So...what does this mean?
Objective: To find and estimate square roots
Jan 3&shy;12:21 PM
Fill in the missing values of the following table:
2
1 = 22 =
32 =
42 =
52 =
62 =
72 =
2
8 =
92 =
102 =
112 =
122 =
132 =
142 =
152 =
Jan 3&shy;12:22 PM
Find the square root of the following numbers:
a) √49
b) √81
c) √144
d) √36
Jan 3&shy;12:24 PM
THINK (without speaking):
Jan 3&shy;12:28 PM
Estimate the square root of the following numbers
a) √23
Can you find the square root of a negative number? Be ready to explain your reasoning. b) √37
c) √132
Jan 3&shy;12:30 PM
Jan 3&shy;12:32 PM
1
3&shy;8 square roots web.notebook
January 03, 2011
Find the exact square root of the following numbers to three decimal places:
a) √23
Homework:
b) √37
page: 177
c) √132
#'s: 1&shy;12, 17&shy;20
Jan 3&shy;12:32 PM
Jan 3&shy;12:37 PM
2
```