If you mean what shape has 3 sides, it's a triangle.
A triangle is a word meaning three sides.
A triangle with three sides is a polygon.
An isosceles triangle.
a triangle is a polygon with three sides.
equilateral triangle
A triangle having two sides does not exist. All triangles have three sides.
A scalene triangle is a triangle that has three unequal sides.
If you mean what shape has 3 sides, it's a triangle.
By definition, there is no such thing as a triangle with 100 sides. A triangle has exactly three (straight) sides; no more and no less. Having three sides means that the shape also has three internal angles and this explains the name.
I believe that is called a Scalene triangle.
A closed figure having three sides and three angles
A three sided closed figure. It is one of the basic shapes of geometry.
A triangle is a word meaning three sides.
That is an equilateral triangle.
Three sides and three angles having a sum of 1800
Triangular means in the shape of a triangle: having three sides.