In the diagram below, O is the center of the circle if ∠QOR = 290o, find the size ∠QPR

In the diagram below, O is the center of the circle if ∠QOR = 290^o, find the size ∠QPR

A 110^o
B 70^o
C 55^o
D 35^o
E 20^o

waec 1990 mathematics

The correct answer is D. 35^o

360^o - 290^o = 70^o

70/2 = 35^o

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