You would approximate because the hypotenuse might not be a perfect square.
Common figures with only rotational symmetry are the recycling sign and fan blades. If a figure coincides with the original twice in one full turn, it has two-fold rotational symmetry, or rotational symmetry order two. ... The square, for example, has four-fold rotational symmetry.
It doesn’t include the number it just stops there
Jessica will need to continue knitting for 4 nights.
9cm - 1cm = 8cm
8cm / 2cm = 4 nights
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7 / 4725 x^6 y^9
simplify
1 / 675 x^6 y^9