# dimensions

• Apr 7th 2009, 08:23 AM
andyboy179
dimensions
hi, i measured the dimensions of an A4 piece of paper i got 210mmX297mm now i need to know what the dimensions of an A3 piece of paper is when the A4 piece of paper has been enlarged by scale factor of 2. ( i think the answer is 594mmX840mm because a normal A3 piece of paper is 297mmX420mm). iam i right if not please help thanks (Rock)
• Apr 7th 2009, 08:26 AM
stapel
Quote:

Originally Posted by andyboy179
hi, i measured the dimensions of an A4 piece of paper i got 210mmX297mm now i need to know what the dimensions of an A3 piece of paper is when the A4 piece of paper has been enlarged by scale factor of 2. ( i think the answer is 594mmX840mm because a normal A3 piece of paper is 297mmX420mm). iam i right if not please help thanks (Rock)

I'm not sure why the dimensions of A3 paper would change, if the dimensions of something else were scaled...? (The exercise, as currently stated, seems non-sensical.) (Surprised)

To learn about scaling, try some online lessons. Once you've obtained clarification of this particular exercise from your instructor, if you're still confused, please reply with the full and exact text of the exercise, your instructor's feedback, and an explanation of how your work relates.

Thank you! (Wink)
• Apr 7th 2009, 08:30 AM
andyboy179
Quote:

Originally Posted by stapel
I'm not sure why the dimensions of A3 paper would change, if the dimensions of something else were scaled...? (The exercise, as currently stated, seems non-sensical.) (Surprised)

To learn about scaling, try some online lessons. Once you've obtained clarification of this particular exercise from your instructor, if you're still confused, please reply with the full and exact text of the exercise, your instructor's feedback, and an explanation of how your work relates.

Thank you! (Wink)

this is my question in full-
measure the dimensions of a piece of A4 paper. what would the dimensions of A3 be if A4 is enlarged by scale factor 2? what is the scale factor of enlargement A4-> A5 and A3-> A5
• Apr 7th 2009, 08:39 AM
You answer in first post is correct (Yes)

this will be clarifying much of it
• Apr 7th 2009, 08:41 AM
stapel
If I'm guessing the meaning correctly, we're supposed to be familiar with the underlying "philosophy" of AX paper, as outlined here; namely, that AX sheets (A3, A4, A5, etc) have dimensions that are always (approximately) in the ratio of width:length = 1/sqrt[2], and that "adjacent" paper sizes have dimensions in the same ratio.

I think this exercise is asking you to scale the current dimensions of an A4 sheet, pretend that these new values are the actual dimensions of an A4 sheet, and then use the ratio between "next" sizes to find the new values of the dimensions of what would be a new sheet of A3.
• Apr 7th 2009, 08:45 AM
andyboy179
Quote:

Originally Posted by stapel
If I'm guessing the meaning correctly, we're supposed to be familiar with the underlying "philosophy" of AX paper, as outlined here; namely, that AX sheets (A3, A4, A5, etc) have dimensions that are always (approximately) in the ratio of width:length = 1/sqrt[2], and that "adjacent" paper sizes have dimensions in the same ratio.

I think this exercise is asking you to scale the current dimensions of an A4 sheet, pretend that these new values are the actual dimensions of an A4 sheet, and then use the ratio between "next" sizes to find the new values of the dimensions of what would be a new sheet of A3.

so is what i said on my first post, was i right