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deepaksoni
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Asked: 2021-03-26T06:47:15+05:30 In:

Question 4. (b) In the figure (ii) given below, O is the centre of the circle. Calculate the values of x and y.

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Question 4. (b) In the figure (ii) given below, O is the centre of the circle. Calculate the values of x and y.

This is the basic and conceptual question from Chapter name- circles
Topic – Angle properties of circles
Chapter number- 15

In this question we have been given the figure of circle with certain information about the figure and we have to find the value of x and y.
ICSE Avichal publication
Understanding ICSE Mathematics
Question 4 (b)

circlesicse boardml aggarwal
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    1 Answer

    1. Guru

      Arc ADC Subtends ∠AOC at the centre and
      ∠ ABC at the remaining part of the circle

      ∠AOC = 2 ∠ABC

      xo = 60o

      Again ABCD is a Cyclic quadrilateral

      ∠B + ∠D = 180o

      (60o + yo = 180o)

      y = 180o – 60o = 120o

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