Yes.
A polygon is a plane figure bounded by a finite number of straight lines. To enclose an area then a minimum of three straight lines are required. All triangles, not just isosceles triangles, are polygons.
An isosceles triangle and an equilateral triangle
Triangle, square and hexagon
Equilateral triangle, square and regular hexagon.
From a distance a cone looks like an isosceles triangle.
a plane triangle is a normal triangle, like the isosceles, right angled, equilateral and scalene triangle.
No, a regular isosceles triangle will not tessellate. In order for a shape to tessellate, it must be able to fit together with copies of itself without any gaps or overlaps. Regular isosceles triangles have angles of 90, 45, and 45 degrees, which do not allow for a repeating pattern that covers a plane without any spaces. Regular polygons that tessellate include equilateral triangles, squares, and hexagons.
A polygon is a plane figure bounded by a finite number of straight lines. To enclose an area then a minimum of three straight lines are required. All triangles, not just isosceles triangles, are polygons.
An isosceles triangle and an equilateral triangle
Triangle, square and hexagon
Equilateral triangle, square and regular hexagon.
Equilateral triangle, square and regular hexagon.
From a distance a cone looks like an isosceles triangle.
It works out as an isosceles triangle
A right triangle that is also isosceles cannot have an angle of 57 deg 24 sec unless it is in spherical - as opposed to plane, or flat - space.
Yes, a parallelogram and an isosceles triangle can tessellate together. This is possible because the angles of the parallelogram can be matched with the angles of the isosceles triangle in a way that allows the shapes to fit together without any gaps. By carefully arranging the triangles and parallelograms, they can cover a plane completely, demonstrating their compatibility in tessellation.
isosceles * * * * * In the Euclidean plane such a triangle could not exist, because the sum of its angles exceeds 180 degrees.