Question

6. Find the number of sides of a regular polygon if its each interior angle is 140°. ​

Answer 1

Answer:

Interior angles of a polygon = 140°

Then, each exterior angle = 140°- 180° = 40°

So, the number of sides regular polygon have = 360°/40° = 9 sides

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Answer 2

Answer:

$each \: interior \: angle \: = 180 \times n - 2 \div 2$

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