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The sum of opposite angles in a
cyclic quadrilateral is 180o
5x + 40 + 3x - 20 = 180o
8x + 20 = 180o
8x = 160o; x = 20o
The difference is
140o - 40o = 100o
johnmulu answered the question on June 9, 2017 at 08:20
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