Geometrymedium · Past Paper
A point P is 25 cm from the center of a circle and the length of the tangent from P is 24 cm. The radius of the circle is:
A7 cm
B10 cm
C12 cm
D15 cm
✓ Correct Answer: A — 7 cm
r^2 = 25^2 - 24^2 = 625 - 576 = 49. r = 7 cm.
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