- A4 cm
- B16 cm
- C8 cm
- D2 cm
Step-by-Step Solution
When circles touch internally, the distance between the centres is the difference of the radii: 10 − 6 = 4 cm.
Answer: A) 4 cm
Two circles of radii 10 cm and 6 cm touch each other internally. How far apart are their centres?
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