Geometrymedium · Past Paper
What is the circumradius of a right-angled triangle with hypotenuse 10 cm?
A10 cm
B5 cm
C2.5 cm
D7.5 cm
✓ Correct Answer: B — 5 cm
In a right triangle, the circumcenter is the midpoint of the hypotenuse, so the circumradius is half the hypotenuse.
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