A=x B=30? C=70 D= 110?

Dear student,7.i) A+B=ACD   [Exterior angle property]x+30°=110°x=80°ii)  PQS+PQR=180°        [Linear pair]115°+x=180°x=180°-115°x=65°in PQRx+x+y=180°     [angle sum property of ]65°+65°+y=180°130°+y=180°y=180°-130°y=50°iii)  Using exterior angle property of traingle,i.e exterior is equal to the sum of two opposite interior angles,2x+3x=110°5x=110°x=22°Regards

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