A triangle.
An equilateral triangle have all angles of 60 degrees, an isosceles has 2 angles of the same value and a a scalene has all angles of different values.
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There is no three-sided shape with two obtuse angles, because the three interior angles of a three-sided shape, which is a triangle, add up to 180 degrees, and two obtuse angles would be over 180 degrees.
An equilateral triangle
A plane (flat) shape with three sides is called a "triangle".Notice that if it has three sides, then it must have three angles.
scalene triangle
Two or three.