Mathematics

In the diagram above, AO is perpendicular to OB. Find x

In the diagram above, AO is perpendicular to OB. Find x

  • A.
    7.5o
  • B.
    15o
  • C.
    22.5o
  • D.
    30o
  • E.
    38.6o
Correct Answer: Option D
Explanation

4x + 3x + 2x + 90 =360° [angle at a point]

9x + 90 = 360°

9x = 360° – 90°

9x = 270

x = 270/9

x = 30°