In the diagram, O is the centre of the circle, In the diagram, O is the centre of the circle, o, A. 110o B. 100o C. 80o D. 70o Correct Answer: Option B Explanation 3x = 2 x 60 = 2y (Angle at centre = 2 x angle at circumference) 3x = 2 x 60 x = (frac{2 times 60}{3}) = 40o 2 x 60 = 2y y = 60o x + y = 40 + 60 = 100o `, props: [‘comment’], data() { return {} }, methods: {} }) {{ reply.posted_by.display_name }}:   {{ reply.created_at }} `, props: [‘comment’, ‘reply’, ‘rate_selection’, ‘token’], data() { return {} }, methods: {} })

In the diagram, O is the centre of the circle, o,

  • A.
    110o
  • B.
    100o
  • C.
    80o
  • D.
    70o
Correct Answer: Option B
Explanation

3x = 2 x 60 = 2y (Angle at centre = 2 x angle at circumference)
3x = 2 x 60
x = (frac{2 times 60}{3}) = 40o
2 x 60 = 2y
y = 60o
x + y = 40 + 60
= 100o

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