In the diagram above, find the value of x

  • A 55°
  • B 50°
  • C 45°
  • D 40°
jamb 2006mathematics

The correct answer is C. 45°

y = 55 (alternate angles)

x = x (same reason)

260 + y + x = 360 (∠s at a point)

260 + 55 + x = 360

315 + x = 360

x = 360 - 315

x = 45

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