Any 3-sided polygon whose internal angles equal to 180 degrees.
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This triangle is called a scalene triangle.
3 Isosceles triangle, Equilateral triangle, and Scalene triangle.
The Duke of Triangle.
triangle
The name of a triangle is dependent on the type of angles within it. If it has a right angle it is called a right triangle, if it has an obtuse angle it is an obtuse triangle, and if all three sides are acute it is an acute triangle.