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A polygon has the following interior angle , (y+10); (y+20); (y+30); (y+40); (y+50);
Y=78 A polygon has a total of 5 interior angles In order to find the total amount of angles in a shape you do (the amount of angles - 2)x180 degrees (5-2(3))180 3x180=540 Add the numbers you know (10+20+30+40+50=150) 540-150=390 and there are 5y altogether so divide 390 by 5 which is 78
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