Question

If radii of two circles are 4 cm and 2.8 cm. Find distance between their centres and also draw figure of these circles touching each other - (i)externally (ii)internally
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Answer 1

The radii of the two circles are 4cm and 2.8cm.
If two circles touch each other externally, then the distance between their centres is equal to the sum of the radii.
Distance between the centres = 4cm + 2.8cm = 6.8cm
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If two circles touch each other internally, then the distance between their centres is equal to the difference of the radii.
Distance between the centres = 4cm − 2.8cm = 1.2cm
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