**Concept- The question tests on basics of Geometry(Lines and angles)**

**Solution: **

The angles form a supplementary pair.

=>5x + 4x =180

=> x = 20 degrees

**(option b)**

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

**Concept- The question tests on basics of Geometry(Lines and angles)**

**Solution: **

The angles form a supplementary pair.

=>5x + 4x =180

=> x = 20 degrees

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