+750 A circle is inscribed in a rhombus with sides of length 4 cm. If the two acute angles in the rhombus each measure $90^{\circ}$, what is the length of the circle's radius? Express your answer in simplest radical form.
+3400
A circle is inscribed in a rhombus with sides of length 4 cm.
If the two acute angles in the rhombus each measure $90^{\circ}$,
what is the length of the circle's radius? Express your answer in simplest radical form.
If the rhombus has two 90o angles, the rhombus is the special case of a square.
The diameter of a circle inscribed in a square is the same as a side of the square.
So the diameter is 4 cm, and the radius is half the diameter, so the radius is 2 cm.
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