no.
A triangle cannot have two parallel sides. In order for a figure to be a triangle, it must be a closed figure with three sides and three angles. If two of the sides were parallel, there is no way the figure could be closed by only one other line.
A polygon is a closed figure bounded by sides. A triangle is a closed figure bounded by three sides. Therefore, according to the definition of polygon triangle is a polygon.
Triangle
A triangle.
A polygon.
A triangle. It has only three sides!
Starting with the definition of polygon makes much easier to understand why triangle is a polygon.Definition: A polygon is a closed figure bounded by sides.Definition of triangle: Triangle is a closed figure bounded by three sides.Since triangle is also a closed figure bounded by sides therefore, triangle is a polygon.
A three sided closed plane figure (shape) is a triangle.
No. Every triangle has 3 sides, and every figure with 3 sides is a triangle. So no triangle can be a parallelogram. Every parallelogram has 4 sides, and every figure with 4 sides is a quadrilateral. So no parallelogram can be a triangle.
If you mean EQUAL sides and angles, than an equilateral triangle.
A closed figure having three sides and three angles
No, a triangle will never have parallel sides.