Question 238349
Imagine that the sides are connected at one end and laying
right on top of eachother. Then imagine that one of the sides
is rotated a tiny fraction of a degree. The sides are now
{{{2}}}, {{{5}}}, and {{{5 - 2 = 3}}} plus a tiny length.
Arranged this way, the 3rd side can't be smaller than {{{3}}} cm
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Now leave the given sides connected at one end, but rotate them
so they are 180 degrees opposite eachother. They now add up to
{{{2 + 5 = 7}}}. Now rotate one of the sides a tiny fraction
of a degree. The sides are now {{{2}}}{, {{{5}}}, and
{{{5 + 2 = 7}}} minus a tiny length.
Arranged this way, the 3rd side can't be greater than {{{7}}} cm
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The 3rd side has to be in this range, 3 cm to 7 cm