## If radii of two circles are 4 cm and 2.8 cm. Draw figure of these circles touching each other – (i) externally (ii) internally.

(i)Circles touching externally If the circles touch each other externally, distance between their centres is equal to the sum of their radii.Distance between the centres = 4+2.8 = 6.8cm(ii)Circles touching internally The distance between the centres of the circles touching internally is equal to the difference of their radii.Distance between the centres = 4-2.8 = […]

## Two circles of radii 5.5 cm and 4.2 cm touch each other externally. Find the distance between their centres.

If the circles touch each other externally, distance between their centres is equal to the sum of their radii.We have r1 = 5.5 and r2 = 4.2Distance between their centres = 5.5 +4.2 = 9.7 cm

## Two circles having radii 3.5 cm and 4.8 cm touch each other internally. Find the distance between their centres.

The distance between the centres of the circles touching internally is equal to the difference of their radii.We have r1 = 3.5 and r2 = 4.8Distance between their centres = 4.8-3.5 = 1.3 cm.