Question

find out the A B C D​

Answer 1

Let the exterior angle be 'x'.

As we can see that :

x = 80°

x+b = 180°.

80°+b = 180°

b = 180-80=100°

therefore b= 100°

Now, d=100° as it is opposite to angle b.

c=80° as it is opposite to angle a.

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