1. Squares and Square Roots

2. ?
Why is this a positive area?

3. 4 6 8 10 12 14 2

4. 4 =
121
100 1 64 81 9
169
225 36 16 25 49
144
196
Fill in the chart =

5. Last comment -9
NOT POSSIBLE!
Not real
-16
-121
-169

6. What is the length of each side?
49 sq. in.
225 yd2
121 mm2
If our classroom were square it would be 25 feet wide and 
25 feet long, so how many squares are needed to tile our 
floor?
625 ft2

7. If the circle is 28 feet in 
diameter and you have to 
have 5 feet as a safety 
area outside of the circle, 
how long approximately is 
the square mat?
2.1.2
Minimum wrestling area shall be enclosed by a circle of 28 feet diameter. Surrounding and secured to the wrestling area of the mat 
shall be a safety mat approximately 5 feet wide. Responsibility lies with referee

8. Draw a line to place on the number line√ _ 4 √ _ 1 √ _ 9 √ _ - 16 √ _
Draw a line to place on the number line

9. Write the square root above the number on the number 
line for five negatives and five positives.

10. (9+16)
(9-5) 25
___ 4 81 9
Be ready to do square roots in a variety of ways. √
100 4

11. 1. Write an expression for this model.

12. so √20 ≈ 4.4 close to 4.5 approximate square roots 20 68 40 751 2 3 4 5 6 7 8 9 10 -1 -2 -3 -4 -5 -6 -7 -8 -9
-10
√25
√16
Here's the median
√16 √17 √18 √19 √20 √21 √22 √23 √24 √25
so √20 ≈ 4.4 close to 4.5

13. 2 3/4
5.3 64 81 8 9

14. 1. 98 2. 43 3.
145 4. 83 5. 22 6. 8 7. 61