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December 6th, 2017, 11:30 PM   #1
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divide paper to rectangles

We have a paper with dimensions 300 millimetres × 210 millimetres.
We want to divide it to equal rectangles that their length is twice the width.
what is the dimensions of the biggest rectangle we can use?
Proof it.
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December 7th, 2017, 01:40 AM   #2
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60 mm $\times$ 30 mm
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December 7th, 2017, 02:03 AM   #3
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need proof

Can you please show me how?
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December 7th, 2017, 03:40 AM   #4
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Factor 300 and 210 then look for a factor of 300 that's twice a factor of 210.
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