There is no upper limit to the number of angles you can have.
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A regular polygon of n sides (where n > 4) has n obtuse angles. Since there is no limit to the number of sides that a polygon can have, there can be no limit to the number of obtuse angles in a shape.
a congruent shape HAS TO HAVE ALL CONGRUENT ANGLES OR IT WOULDNT BE A CONGRUENT sHAPE
A circle. One side, zero angles. Also a line as it is a 1-dimensional shape.
(number of angles -2)*180
There is no such shape since an angle can always be added to any shape.