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Question 14. The length of the direct common tangent to two circles of radii 12 cm and 4 cm is 15 cm. Calculate the distance between their centres

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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 been given the length of the direct common tangent to two circles of radii 12 cm and 4 cm is 15 cm.

And we have to calculate the distance between their centres

ICSE Avichal publication
Understanding ICSE Mathematics
Question 14

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1 Answer

  1. Solution:
    Let R and r be the radii of the circles
    with centre A and B respectively
    Let TT’ be their common tangent.
    ML Aggarwal Class 10 Solutions for ICSE Maths Chapter 15 Circles Ex 15.3 Q14.1
    Hence distance between their centres = 17 cm Ans.

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