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May 5, 2015

Posted by **brianna** on Sunday, December 14, 2008 at 5:58pm.

If the perimeterof the place mat is 60 in., the perimeter of the napkin is what?

i think i have to divide 60 by 1.5, but i'm not sure baecause the question says the DIMENSIONS, which is comfusing me.

- math (again ugh) -
**Damon**, Sunday, December 14, 2008 at 6:02pmYes, you are right.

Dimensions are length

NOT area

NOT volume

- math (again ugh) -
**brianna**, Sunday, December 14, 2008 at 6:07pmso i don't have to multiply 1.5 by 4? i thought i had to because of the dimensions part, and becauseof the fact that the question says "dimensions" i thought it meant plural, as in more than 1.

- math (again ugh) -
**Damon**, Sunday, December 14, 2008 at 6:09pmEvery length measurement (in inches or cm or whatever) is 1.5 times. That includes the perimeter in inches.

If they asked for area, the big one would be 1.5*1.5 = 2.25 times

But they did not ask for area.

- math (again ugh) -
**brianna**, Sunday, December 14, 2008 at 6:14pmohhh. it makes sense now. good thing to , 'cause i wasn't at school for the lecture on my packet my teacher gave me for homework

so if they ask for area, then i'll have to multiply double. iget it thanks. but if you don't mind, i have another question.

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**Damon**, Sunday, December 14, 2008 at 6:13pmNow say the place mat were

L = 20

W = 10

then Perimeter = 2*20 + 2*10 = 40+20 = 60

Then the napkin

L = 20/1.5 = 13 1/3

W = 10/1.5 = 6 2/3

then perimeter = 26 2/3 + 13 1/3 = 40

Notice that 60 = 1.5 * 40 :)

- math (again ugh) -
**brianna**, Sunday, December 14, 2008 at 6:16pmi know how to get perimeter, it's just when the word problems confuse me.

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**brianna**, Sunday, December 14, 2008 at 6:18pmabout the question i posted earlier, i get it now that you explained it to me.

THANKS.

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**Damon**, Sunday, December 14, 2008 at 6:20pmNow, just to be mean, let's see what happens to the AREA of the napkin

area placemat = 20 * 10 = 200 in^2

area napkin = 13 1/3 * 6 2/3 = 88 8/9

and notice that

88 8/9 *1.5 *1.5 = 200

- math (again ugh) -
**brianna**, Sunday, December 14, 2008 at 6:44pmthat is mean jk lol

ok,so the area of the placemat would be 200 because 20*10=200, but the area of the napkin is that why?

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**brianna**, Sunday, December 14, 2008 at 6:53pmso the area of the napkin is proportional to the place mat i get it thats cool

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