WAEC 2025 · Paper 1 · Q33✱✱

In the diagram, AO⊥OBAO \perp OB. Find xx.

2x3x4xOAB
Worked solution (try it first)
  1. Angles at a point add up to 360∘360^\circ, and the right angle takes 90∘90^\circ.
  2. So 2x+3x+4x=360∘−90∘2x + 3x + 4x = 360^\circ - 90^\circ
    =270∘= 270^\circ.
  3. So 9x=270∘9x = 270^\circ and x=30∘x = 30^\circ, option D.

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