Question

If two circles with radii $8$cm and $3$cm respectively touch externally, then find the distance between their centres.

Answer 1

Given that two circles with radii $8cm$ and $3cm$ touch externally.

We need to find the distance between the centres.

We know that, "If the two circles touch externally then the distance between the centres will be equal to the sum of the radii".

Therefore the distance between the centres $=8+3=11cm$