WAEC - Mathematics (1995 - No. 32)
In the diagram above, AO is perpendicular to OB. Find x
7.5o
15o
22.5o
30o
38.6o
설명
4x + 3x + 2x + 90 =360° [angle at a point]
9x + 90 = 360°
9x = 360° - 90°
9x = 270
x = 270/9
x = 30°
In the diagram above, AO is perpendicular to OB. Find x
4x + 3x + 2x + 90 =360° [angle at a point]
9x + 90 = 360°
9x = 360° - 90°
9x = 270
x = 270/9
x = 30°