Question

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?

Answer 1

169 is the square of 13

Answer 2

13-8=5

Answer 3

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

Answer 4

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

Answer 5

i say don't worry about it

Answer 6

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

Answer 7

the ^2 pertains the the letters, not the numbers

Answer 8

yeah what ecin said

Answer 9

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

Answer 10

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

Answer 11

satellite wait till she got to volume

Answer 12

cubic units

Answer 13

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

Answer 14

no, square root of 169 is 13.

Answer 15

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

Answer 16

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

Answer 17

sry pat that is what I meant not square feet

Answer 18

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

Answer 19

yeah, but that is having the same concept

Answer 20

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

Answer 21

it is okay...

Answer 22

l*w= A * some^2 unit

Answer 23

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

Answer 24

quit while you are ahead!

Answer 25

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

Answer 26

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

Answer 27

just follow what i did awarr28

Answer 28

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

Answer 29

start with basic things, and things you can conceptualize

Answer 30

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

Answer 31

you are welcome^_^

Answer 32

say you have tiled floors and they are all 1 feet

Answer 33

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

Answer 34

ok, I thank you all for your help.

Answer 35

1 feet by 2 feet = 2 squares

Answer 36

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

Answer 37

oh ok I see what your saying

Answer 38

2 feet by 3 feet are six boxes

Answer 39

and that's the area

Answer 40

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

Answer 41

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

Answer 42

yea

Answer 43

;)

Answer 44

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

Answer 45

you don't want nothing or nobody in that space

Answer 46

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

Answer 47

gotcha