If you mean what shape has 3 sides, it's a triangle.
A triangle is a word meaning three sides.
An isosceles triangle.
A polygon.
it's a triangle (three sides) with two sides having equal lengths and angles
The least number of sides a polygon can have is three, which forms a triangle. Polygons are defined as two-dimensional shapes with straight sides, and a triangle, having three sides, is the simplest form that meets this criterion. Shapes with fewer than three sides do not enclose a space and are not classified as polygons.
Having three sides.
A triangle having two sides does not exist. All triangles have three sides.
A triangle is a word meaning three sides.
A closed figure having three sides and three angles
Three sides and three angles having a sum of 1800
A triangle whose sides are curved outwards.
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.
triangle
Triangular means in the shape of a triangle: having three sides.
equilateral triangle
An isosceles triangle.
A polygon.