JAMB - Mathematics (1988 - No. 44)

In the figure, PQ is a parallel to ST and QRS = 40o. Find the value of x

55^o

60^o

65^o

75^o

From the figure, 3x + x - 40o = 180o

4x = 180o + 40o

4x = 220o

x = \(\frac{220}{4}\)

= 55o