Geometrymedium · Past Paper
If the side of a square inscribed in a circle is 10 cm, what is the radius of the circle?
A5 cm
B5 * sqrt(2) cm
C10 cm
D10 * sqrt(2) cm
✓ Correct Answer: B — 5 * sqrt(2) cm
Diagonal of square = Diameter of circle. 10 * sqrt(2) = 2r => r = 5 * sqrt(2) cm.
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