Question

Radii of two circles are 12.8 cm and 7. 3 cm. Find the distance between their centres if they :
(1) touch each other externally.
(2) touch each other
internally.​

Answer 1

Answer:

(1) 20.1 cm

(2) 5.5 cm

Step-by-step explanation:

(1) if they touch externally = big radius + small radius

                                          = 12.8 + 7.3

                                          = 20.1 cm

(2) if they touch internally = big radius - small radius

                                          = 12.8 - 7.3

                                          = 5.5 cm