WAEC - Mathematics (1988 - No. 18)
Calculate the value of x in the diagram above
18o
30o
40o
60o
15°
Explanation
vertically opposite angles are equal, hence
3x + 6x + 3x = 180°
12x = 180°
x = 15°
Calculate the value of x in the diagram above
vertically opposite angles are equal, hence
3x + 6x + 3x = 180°
12x = 180°
x = 15°