Question

Two circles with radii 3.5 cm and 2.5 cm touch each other internally. Find the distance between their centres.

Answer 1

1cm

Explanation:

Kindly refer to the attached image for clarity

Given data

Let the big circle have a radius R= 3.5cm

and the small circle have a radius r= 2.5cm

From the image, we can see that the distance between the two centers is the difference of the radii

Distance= R-r

Distance= 3.5-2.5= 1cm

Hence the distance is 1cm