Oh, dude, you're hitting me with the tricky questions! Technically, a three-sided shape that's not a triangle is called a "trigon." It's like the rebellious cousin of the triangle that doesn't play by the rules. So yeah, it exists, but it's not really stealing the spotlight from the classic triangle, you know what I mean?
a triangle anything with 3 sides is a triangle
A triangle can also be called a three sided polygon, or possibly a wedge shape.
A three sided closed plane figure (shape) is a triangle.
A 3 dimensional triangle is called a pyramid, otherwise a 2D three sided polygon shape is exactly what you called it, a triangle.
No. A three-sided polygon is, by definition, a triangle.
A triangle is a three sided shape.
A triangle.
triangle
triangle
A three sided shape is a triangle, all the angles in a triangle add up to 180 degrees.
a triangle
to be a three sided shape
A triangle
a triangle
No it cannot. A triangle is by definition a three sided shape.
An equilateral triangle.
a triangle anything with 3 sides is a triangle