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A quadrilateral can have 0 to 3 acute angles, but never 4:

  • A rectangle and a square are both quadrilaterals with four right angles, hence they have no acute angles.
  • A kite-shaped figure can have one acute and three obtuse angles, or three acute and one obtuse angles.
  • A parallelogram and a rhombus have two acute and two obtuse angles.

The sum of the interior angles of any quadrilateral is 360º; thus it would be impossible for all angles to be acute (less than 90º each)

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Wiki User

8y ago

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I Disagree 0-4 Can Be It

Here Is A Quadrilateral That Has 4 Acutes!

line, triangle, triangle, azure
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Evan Liu

Lvl 2
4y ago
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Q: How many acute angles can be in a quadrilateral?
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