Question

In the given figure,find angle ABC​

Answer 1

Answer:

angle abc is 80 degrees

Step-by-step explanation:

angle bac = 20 degrees because vertically opposite angles

angle bac + angle abc = 100 because exterior angle property

therefore 20 + angle abc = 100

               angle abc = 100 - 20

               angle abc = 80 degrees

Answer 2

Answer:

80°

Step-by-step explanation:

first of all angle bac = 20°(vertically opposite angles)

and angle acb = 180-100=80°

so, in triangle abc , all angles sum must be 180

20°+80°+abc=180

so, abc= 80°

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