If a polygon has at most one non-acute angle how many sides

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1.a) Prove:  if every angle of a polygon is acute, then the polygon is a triangle. That is, it can't be a quadrilateral, or  a  pentagon, or  any  n-gon  with  n > 3.

b) If a polygon has one right angle and  otherwise  acute  angles, how  many sides  can  it have? Prove your  answer.

c) If a polygon has at most one  non-acute angle, how many sides can it have? In your proofs, you may use standard facts about angles in polygons.

Reference no: EM13588334

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