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Q: Does every triangle have 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.

It needs at least 1 obtuse angle. Usually you can only have one obtuse angle, so the rest would be acute.

No. A triangle can have only one obtuse angle. A triangle must have at least two acute angles

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

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

Yes, as long as there is at least one right angle in the triangle. No way.

Not sure what the question means. A triangle or quadrilateral may but need not contain an obtuse angle. A pentagon or any polygon with more sides must contain at least one obtuse angle.

-- The sum of all three angles inside every triangle is always 180 degrees. -- An obtuse angle is an angle with more than 90 degrees in it. -- So two obtuse angles have more than 180 degrees between them. -- So they can't both be in the same triangle, unless at least part of one of them is left hanging out.

obtuse triangle

Equilateral triangle = All sides congruent Scalene triangle = No sides congruent Isosceles triangle = At LEAST two sides congruent Right triangle = Triangle with one right angle Obtuse triangle = Triangle with ONE obtuse angle Acute triangle = Triangle with ALL acute angles

No triangle is never acute in the sense that every triangle has at least two acute angles.

Yes, it must have at least one obtuse angle.

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