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deepaksoni
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Asked: 2021-04-01T13:55:16+05:30 In:

Question 5. Two circles of radii 5 cm and 2-8 cm touch each other. Find the distance between their centres if they touch : (i) externally (ii) internally.

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This is the basic and conceptual question from Chapter name- circles
Topic – Angle properties of circles
Chapter number- 15
We have two circles of radii 5 cm and 2-8 cm touch each other and we have to find the distance between their centres if they touch : (i) externally (ii) internally.

ICSE Avichal publication
Understanding ICSE Mathematics
Question 5, exercise 15.3

icseml aggarwal
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    1. Guru

      Solution:
      Radii of the circles are 5 cm and 2.8 cm.
      i.e. OP = 5 cm and CP = 2.8 cm.
      ML Aggarwal Class 10 Solutions for ICSE Maths Chapter 15 Circles Ex 15.3 Q5.1
      (i) When the circles touch externally,
      then the distance between their centres = OC = 5 + 2.8 = 7.8 cm.
      (ii) When the circles touch internally,
      then the distance between their centres = OC = 5.0 – 2.8 = 2.2 cm

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