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these are two different terms,

isosceles means a triangle with two sides the same length, and hence two angles the same length.

obtuse means there is at least one angle that is greater than 90 degrees.

since two of the angle have to be the same, you know that only one such angle can exist, so is with any triangle anyway.

just try to imagine a triangle with two sides the same length with one angle larger than 90 degrees. yup it's possible

Q: Can a triangle be both isosceles and obtuse?

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An obtuse triangle is not necessarily isosceles, but it can be.

-- An isosceles triangle can also be an obtuse triangle but it doesn't have to be. -- An obtuse triangle can also be an isosceles triangle but it doesn't have to be. So there's no consistent diferences betwen them.

It can be an isosceles triangle or a scalene triangle if it has 1 obtuse angle

No. An obtuse triangle can be isosceles. It just can't be a right or equilateral triangle.

no- it can be an isosceles triangle

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An obtuse triangle is not necessarily isosceles, but it can be.

An isosceles obtuse triangle is a triangle with 1 obtuse angle and only 2 congruent sides.

It is an obtuse angled isosceles triangle.It is an obtuse angled isosceles triangle.It is an obtuse angled isosceles triangle.It is an obtuse angled isosceles triangle.

-- An isosceles triangle can also be an obtuse triangle but it doesn't have to be. -- An obtuse triangle can also be an isosceles triangle but it doesn't have to be. So there's no consistent diferences betwen them.

It can be an isosceles triangle or a scalene triangle if it has 1 obtuse angle

No. An obtuse triangle can be isosceles. It just can't be a right or equilateral triangle.

no- it can be an isosceles triangle

No

it i a triangle that only has one obtuse angle

there is equilateral triangle, right triangle, isosceles triangle, obtuse triangle, acute triangle, scalene triangle and oblique triangle

yes a isosceles triangle has a right,obtuse and acute angle.

No. Only a few are.