The sides PQ & RS of a quadrilateral PQRS are produced as shown in the figure. Prove that a+b = x+y.

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  • -2
pic is not clear
  • -1
PQR=180-a
PSR=180-b
In quad. PQRS: P + Q+ R +S =360
                         x + 180-a +y + 180-b = 306
                         x+y=a+b
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