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Question 138

If two circles of radii, 7 cm and 10 cm respectively touch each other internally, then the distance between their centres, in centimeters, is

Solution

If circles are touching internally the distance between their centers will be = radius of bigger circle - radius of smaller circle

= 10 - 3

= 3 cm Answer

note -

If circles are touching externally the distance between their centers will be = = radius of bigger circle + radius of smaller circle

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