Triangle is plane with three sides and three angles. The sum of its inside angles is equal to 180 degrees.
A triangle.
A plane figure with three straight sides and three angles.
A polygon.
A polygon is a plane figure with at least three straight sides and angles, so a triangle qualifies.
Triangle is plane with three sides and three angles. The sum of its inside angles is equal to 180 degrees.
A triangle.
A plane figure with three straight sides and three angles.
If you mean EQUAL sides and angles, than an equilateral triangle.
A triangle has 3 sides and 3 interior angles that add up to 180 degrees.
A polygon.
A triangle is a plane figure that has three sides and three corners that are called angles. "Tri" is the Greek root for the word "three". So "triangle" means "three angles" and describes the figure.
A polygon is a plane figure with at least three straight sides and angles, so a triangle qualifies.
A plane figure with four sides and at least three right angles. There are other descriptions.
That is a triangle.
That is a triangle.
A plane (flat) shape with three sides is called a "triangle".Notice that if it has three sides, then it must have three angles.