Geometryhard · Past Paper
What is the radius of the circle passing through the vertices of a right-angled triangle with sides 5, 12, 13?
A5 cm
B6 cm
C6.5 cm
D13 cm
✓ Correct Answer: C — 6.5 cm
In a right triangle, the circumradius is half the hypotenuse: 13 / 2 = 6.5 cm.
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