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Question 15. Calculate the length of a direct common tangent to two circles of radii 3 cm and 8 cm with their centres 13 cm apart.

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One of the most important and exam oriented question from Chapter name- circles
Topic – Angle properties of circles
Chapter number- 15

It is given that two circles are 13 cm apart with their centres. Radii of them are 3 cm and 8 cm.

We have to calculate the length of a direct common tangent to them.

ICSE Avichal publication

Understanding ICSE Mathematics
Question 15

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1 Answer

  1. Solution:
    Let A and B be the centres of the circles
    whose radii are 8 cm and 3 cm and
    let TT’ length of their common tangent and AB = 13 cm.
    ML Aggarwal Class 10 Solutions for ICSE Maths Chapter 15 Circles Ex 15.3 Q15.1

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