One of the most important and exam oriented question from Chapter name- circles

Topic – Angle properties of circles

Chapter number- 15

In this question Two concentric circles are of the radii 13 cm and 5 cm are given. And we have to find the length of the chord of the outer circle which touches the inner circle.

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Understanding ICSE Mathematics

Question 4, exercise 15.3

Solution:Two concentric circles with centre O

OP and OB are the radii of the circles respectively, then

OP = 5 cm, OB = 13 cm.