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An irregular polygon has external angles as 140,120,142,132,112and a.

5 years ago

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R_scott
sure they are not internal??
5 years ago
oobleck
If so, note that there are 7 angles, so also seven sides.
The sum of the interior angles of a 7-gon is (7-2)*180 = 900
Now you can find a.
5 years ago

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