Two circles touch internally. Their diameters are, respectively, 8 cm and 4 cm. Whatis the distance (in cm) between their centres?
Answer & explanation
Correct answer: option 2
Diameter of big triangle = 8 cm
Radius of big triangle = 4 cm
Diameter of small triangle = 4 cm
Radius of small triangle = 2 cm
Distance between their centers = 4 - 2 = 2 cm