A circle has a radius of 5.5 cm. The distance between the centre o of the circle and points A, B, C, D are given. Tick the correct answer i) OA = 3 cm; Location of A : (interior/exterior/on the circle) ii) OB = 5.5 cm; Location of B : (interior/exterior/on the circle) iii) OC = 5 cm; Location of C : (interior/exterior/on the circle) iv) OD = 5.9 cm; Location of D : (interior/exterior/on the circle)
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Answer: It is given that two circle having radii 5.5 cm and 4.2 cm touch each other externally. We know, the distance between the centres of the circles touching externally is equal to the sum of their radii. Thus, the distance between their centres is 9.7 cm.
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