- A90°
- B180°
- C270°
- D360°
Step-by-Step Solution
Sum = . Increasing by 1 adds one more 180°, so the sum increases by 180°.
Answer: B) 180°
When a new polygon is formed by adding one more side to an existing polygon, by how much does the sum of its interior angles increase?
Class 8Angle Sum of PolygonsQuadrilaterals
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