solve the following question
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- let angle A = 13x
- B= 4x
- C=5x
- D= 8x
13x+4x+5x+8x = 360° ( Angle sum property of quadrilateral)
30x = 360°
x=360°/30
x= 12°
therefore , B= 4x
=4*12°
= 36°
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