if the sides of a square are lengthened by 8cm, the area becomes 169cm^2. Find the length of a side of the original square.
The length of a side of the original square is ..... cm?

- anonymous

- chestercat

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- anonymous

169 is the square of 13

- anonymous

13-8=5

- anonymous

i didnt really understand the whole cm^2 thing to figure it out

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## More answers

- anonymous

that just means area. area is given in terms of square units

- anonymous

i say don't worry about it

- anonymous

you wouldn't say the area of a table top is 10 feet. that is a linear measure. you could say it is 10 square feet

- anonymous

the ^2 pertains the the letters, not the numbers

- anonymous

yeah what ecin said

- anonymous

follow this,
Let x be the original side
A=169
A=s^2
169=(x+8)^2, we can extract the square root of both sides
13=x+8
x=13-8
x=5 cm , this is the original side

- anonymous

so u would say for 169cm^2 , 169 square feet. so u just squared the 169? then - from 8

- anonymous

satellite wait till she got to volume

- anonymous

cubic units

- anonymous

if you had something that's 16 sq ft and it is square in shape

- anonymous

no, square root of 169 is 13.

- anonymous

then each side would be 4, .. and the area is 4^2

- anonymous

actually i did not square the 169. i thought of a number whose square is 169

- anonymous

sry pat that is what I meant not square feet

- anonymous

in other words \[\sqrt{169}=13\]

- anonymous

yeah, but that is having the same concept

- anonymous

but that's only the case of a truly square shape, for now you should just ignore the sq units and just put it on the answer as a definition

- anonymous

it is okay...

- anonymous

l*w= A * some^2 unit

- anonymous

yeah well i hope to not take anymore math after this class, keeps me stresses grrrr..lol

- anonymous

quit while you are ahead!

- anonymous

a cm * b cm = a* b cm^2, not cm^2 will always be there, so take it as a definition

- anonymous

in my case, i do pay attention because its' not always the same. I'm in engineering

- anonymous

just follow what i did awarr28

- anonymous

oh ok ecin, at least I'm taking notes, but half the time I have to keep coming back to ask because i still cant figure it out...lol

- anonymous

start with basic things, and things you can conceptualize

- anonymous

yes I wrote that down pat, thank you all for all your help

- anonymous

you are welcome^_^

- anonymous

say you have tiled floors and they are all 1 feet

- anonymous

or mess around with the little squares in graph papers think about them as square feets

- anonymous

ok, I thank you all for your help.

- anonymous

1 feet by 2 feet = 2 squares

- anonymous

its like you are shading every little box or tile you count

- anonymous

oh ok I see what your saying

- anonymous

2 feet by 3 feet are six boxes

- anonymous

and that's the area

- anonymous

dont' worry about why, but just put it at the end ft^2

- anonymous

so 2 feet by 6 feet would be 12 boxes right?

- anonymous

yea

- anonymous

;)

- anonymous

you can also think about it like this "clear the area"

- anonymous

you don't want nothing or nobody in that space

- anonymous

a perimiter on the other hand is just like a gate.. is a measurement of the outside

- anonymous

gotcha

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