Question:

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

Answer:

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 = 4.2
Distance between their centres = 5.5 +4.2 = 9.7 cm

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

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