No, a scalene triangle is simply one that has three unequal sides. An obtuse triangle is one that has one angle of greater than 90 degrees.
As an example, this page shows three different scalene triangles:
http://mathworld.wolfram.com/ScaleneTriangle.html
The one on the left is a right triangle. The one in the middle is obtuse. The one on the right is acute.
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An obtuse scalene triangle.
A triangle can be constructed into any of the given formats.
equilateral triangle, scalene triangle, and isoceles triangle Also, acute, obtuse, and right
An equiangular triangle is always equal. A scalene triangle does not have to have any equal sides. Therefore an equiangular triangle in never scalene.
Thay aren't. A scalene triangle has 3 uncongruent sides. While an isoceles has only one uncongruent.