Each box covers 252 feet
What does this mean?
How do I find out how much I need?
So squared or ft2
is a measurement....
can I make a perfect square shape with this box of laminate?
What is a square?
Can you use the paper provided to make a perfect square?
Can you divide the sides equally ?
Can you connect lines to each side?
How many smaller squares can you count?
You just made a Squared Number!
so 32 is 9 squares
Math 8
Square Numbers
NAME ?
Sept. 2013
Can I add Lines to this square to
make exact equal other squares?
Any time you can arrange numbers or objects into
perfect squares, we call them square numbers
NAME ?
September __ 2013
What is a Power?
31
32
33
34
35
SQUARED is another name for the "the power of 2"
52 = 5 X 5 = 25
Why are they called SQUARE numbers
http://www.youtube.com/watch?v=bg0OVOo-PAw
Square Roots of Perfect Squares
144 m2
How would I find the length of the sides of this
square mat?
* We know it is a perfect square
in a square all sides are equal
to find AREA , L Χ W
We have to find the length of one side,
1) guess and check try 9,
9Χ9 = 81
102=
112=
122=
2) Use your calculator to find the "square root"
square root - one of two equal numbers factors of
and for a number
√49 = 7
√100 = 10
http://www.ted.com/talks/arthur_benjamin_does_mathemagic.html
144 m2
√144 =
12
The square of 29 is 841
What is the square root of 841?
The square root of a perfect square is 16
What is the perfect square?
Textbook
Page 14
6, 8, 9, 10, 11, 16, 17
Estimate Square Roots
Estimate- an educated and calculated response to a math
question, usually by rounding decimal numbers.
A square floor has an area o
85m2
85 m2
About how long are the
sides of the wall?
what multiplied by
itself is close to 85?
THINK
92 = 9 x 9 = 81
102 = 10 x 10 = 100
9.22
√ 85
= 9.21
The length of the sides of the square is
about 9.2 m.
Try these:
Estimate
each square root to one decimal
place
√ 27
5.2
√ 56
7.5
√ 416
20.4
Page 118
1,2,4,5,,7,8,9,10,
12,13,14,15
Squared Numbers Quiz
NAME______________
Fill in the blank
52=____
32=____
√
81=____
√ 121=___
Estimate the Square Root
√ 40 = ____
√
95=____
95 m 2
A square carpet has an area of 95 m2. Estimate the length of
each side.
SIDE _________