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Sagot :
SOLUTION
From the question, since all the angles in the polygon are obtuse, it means that all the angles are greater than 90 degrees but less than 180 degrees.
For a trapezoid, the anterior angles are obtuse, but the posterior angles are acute (less than 90 degree), so a trapezoid is wrong
For a parallelogram, it has two opposite acute angles and two opposite obtuse angles. So it's wrong too
For triangle, if a triangle has one obtuse angle, then the other two will be acute. This is also wrong
Hence the answer is a pentagon. A regular pentagon has each of its interior angle as 108 degree.
So, the answer is option D. Pentagon
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