Question

Two circles touch each other. One of the circles has a diameter of 26 cm and the other
circle has a diameter of 12 cm.
Write down

(a) the least distance between the centres of the two circles,

(b) the greatest distance between the centres of the two circles

Answer 1

(a) if the smaller circle is inside the larger circle , the center-to-center distance is ... 7 cm

(b) if the smaller circle is outside the larger circle , the center-to-center distance is ... 19 cm