Question

The size of an interior angle of a regular polygon is 3x while exterior is (x-20).find the number of sides of the polygon

Answer 1

Answer:

3x+(x-20)=180. (linear pair)

so,4x-20=180

so,4x=200

X=200/4=50

exterior angle=x-20=50-20=30

so, no. of side of polygon= 360/exterior angle

so, no. of side of polygon=360/30=12

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