Answers

2015-06-03T21:26:44+05:30
According to angle sum property of quadrilaterals (360⁰),
20 + 4x - 5 + 5x - 2 + 145 = 360
4x + 5x + 145 + 20 - 5 - 2 = 360
9x + 158 = 360
9x = 360 - 158 = 202
x =  \frac{202}{9}
x = 22.444444444444 and so on...
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