Question

8. In a cyclic quadrilateral ABCD,
angle A=60°. , angle B=70° ,then
the value of x-y ,if angle D=x and
angle Cry
O 20°
O 10°
O 130°
O none of these​

Answer 1

Answer:

Step-by-step explanation:

R.E.F image  

cyclic quadrilateral-

opposite angle are

equal for 11 sides  

∴∠A+∠C=180  

∘

  &  ∠B+∠D=180  

∘

 

∴(∠B+∠D)=180  

∘

 

∠D+∠B=180  

∘

⇒∠D=180−70=110  

∘

 

∠A=110  

∘

=∠D &∠B=70  

∘

 

(for parallel  sides)