**CONCEPT: **The question tests on the basics of Geometry.

**SOLUTION: **

Since AB=BC,

4x−30=2x+10

=>x=20∘

Thus 4x-30=50 and the other angle 2x+10 should also be 50.

The third angle asked =180-(50+50)=80

**(OPTION E)**

Modified on: Tue, 12 Oct, 2021 at 2:11 PM

**CONCEPT: **The question tests on the basics of Geometry.

**SOLUTION: **

Since AB=BC,

4x−30=2x+10

=>x=20∘

Thus 4x-30=50 and the other angle 2x+10 should also be 50.

The third angle asked =180-(50+50)=80

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