WAEC - Mathematics (1988 - No. 18) | ExamPlay

WAEC - Mathematics (1988 - No. 18)

Calculate the value of x in the diagram above

18^o

30^o

40^o

60^o

15°

Explanation

vertically opposite angles are equal, hence

3x + 6x + 3x = 180°

12x = 180°

x = 15°

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