In the diagram above, O is the center of the circle QRT and PT is a tangent to the circle at T. Calculate the angle x

In the diagram above, O is the center of the circle QRT and PT is a tangent to the circle at T. Calculate the angle x

A 55^o
B 40^o
C 35^o
D 25^o
E 20^o

waec 1989 mathematics

The correct answer is E. 20^o

â QPT = x^o = 180^o - 125^o - 35^o = 20^o

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