Question:

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

Answer:

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 = 4.8
Distance between their centres = 4.8-3.5 = 1.3 cm.

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

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