In the diagram above, AO is perpendicular to OB. Find x
- A.
7.5^{o} - B.
15^{o} - C.
22.5^{o} - D.
30^{o} - E.
38.6^{o}
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°