Circles II

  • For each question, choose the most suitable answer.
    • 1. In the diagram, O is the centre of circle and PQR and RST are straight lines. Given that the radius is 5 cm, find the length, in cm, of PR.
      • A) 3
      • B) 4
      • C) 6
      • D) 8
    • 2. In the diagram, O is the centre of circle and DAC is a right angle. If AD = 15 cm, DC = 17 cm and BC = 6 cm, find the diameter, in cm, of AB.
      • A) 8
      • B) 10
      • C) 13
      • D) 15
    • 3. In the diagram above, O is the centre of circle. <br/>Find the value of <i>y</i>.
      • A) 110°
      • B) 120°
      • C) 130°
      • D) 140°
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