The radius of the circle = circumference / (2 * PI)
radius = 50 /
<span>
<span>
<span>
6.2831853072 cm </span></span></span>
radius =
<span>
<span>
<span>
7.9577471546 cm</span></span></span>
<span><span><span /></span></span>
<span>Two radii of the circle plus the side of the square form a 45 45 90 triangle.
</span><span>The side of the square = radius * sq root (2)
</span>The side of the square = <span>
<span>
7.9577471546 * </span></span><span><span><span>1.4142135624
</span></span></span><span><span><span>
</span></span></span><span><span><span />
</span>
</span>
<span><span><span>The side of the square = 11.25 cm</span></span></span><span><span><span /></span></span>
<span><span><span /></span></span>