Q: What shape has at least one obtuse angle?

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-- If a triangle has an obtuse angle in it, then it's called an obtuse triangle. -- No triangle can have more than one obtuse angle in it . -- Right triangles, acute triangles, and equilateral triangles don't have any obtuse angles in them.

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Yes. Any polygon with more than four sides MUST have at least one obtuse angle.

It ha one right angle, two obtuse angles and one acute angle

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A trapezoid and a rhombus are examples of shapes with more than one obtuse angle.

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-- No right triangle, acute triangle, or equilateral triangle has an obtuse angle in it. -- If a triangle has an obtuse angle in it, then it's called an obtuse triangle. -- No triangle can have more than one obtuse angle in it .

Trapezoids ALWAYS have at least one obtuse angle (if they have two right angles, then there will only be one obtuse angle), usually two (in any other circumstance, they will have two obtuse and two acute angles).

-- If a triangle has an obtuse angle in it, then it's called an obtuse triangle. -- No triangle can have more than one obtuse angle in it . -- Right triangles, acute triangles, and equilateral triangles don't have any obtuse angles in them.

Yes, because the angles have to add up to 360º, at least one angle has to be obtuse.

An obtuse triangle has one of its angle greater that 90 degrees.His plate was in the shape of an obtuse triangle.

An obtuse triangle has 1 obtuse angle and 2 different acute angles and they all add up to 180 degrees

No there isn't

There are versions of quadrilaterals, pentagons and hexagons that have only two obtuse angles. If a shape with seven or more sides has two (or fewer) obtuse angles, it will also have at least one reflex angle and so will no longer be a convex polygon.