Level 3
In the figure, O is the centre of the circle. ∠ABD is 90°. Find ∠x.
3 m
Level 3
In the figure, O is the centre of the circle and OABC is a rhombus. Find the value of ∠a + ∠b + ∠c + ∠d.
3 m
Level 3
In the figure, O is the centre of the circle and SPQ is a straight line. Given that RS is parallel to OP, find ∠PSR.
4 m
Level 3
In the figure, O is the centre of the circle, AO is parallel to BC and ∠BOC = 100°. Find the values of
  1. ∠p
  2. ∠q
  3. ∠r
4 m
Level 3
In the figure, ABCD is a parallelogram. O is the centre of the circle. Find
  1. ∠ADC
  2. ∠ABD
4 m