Geometryeasy · Past Paper
If a chord of length 8 cm is at a distance of 3 cm from the center, what is the radius?
A4 cm
B5 cm
C6 cm
D7 cm
✓ Correct Answer: B — 5 cm
Using Pythagoras: r^2 = (chord/2)^2 + distance^2 = 4^2 + 3^2 = 16 + 9 = 25. r = 5.
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