I don't understand the 3rd part of my maths holiday homework please explain it.
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let the polygon be a triangle. regular triangle
1st exterior angle = 180-60 = 120
2nd and 3rd are the same so, it is 120
total of three angle = 3*120 = 360
[180-60 ( linear pair) ]
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it is to show that exterior angle of regular polygon is 360
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