Geometrymedium · Past Paper
Two circles touch internally. Their radii are 10 cm and 4 cm. What is the distance between their centers?
A14 cm
B6 cm
C7 cm
D4 cm
✓ Correct Answer: B — 6 cm
For internal touching, the distance between centers is the difference of radii: 10 - 4 = 6 cm.
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