1.tri- just like 3
2-Angle- just an angle
thats classification for yas all lol
An isosceles triangle and an equilateral triangle
might be an equilateral triangle. isosceles triangle or a right angled triangle :)
trtdrtdrtd
In two dimensions, lines can be parallel, angles cannot. So no plane shape has parallel angles.
It is an indication of an error, or the fact that the triangle is not in the Euclidean plane but on a convex surface.
Triangle Plane Square
A triangle is a plane figure so it has two dimensions: length and breadth.
In plane geometry at least two angles must be acute in a triangle.
Plane and Triangle
heptagon and an equilateral triangle
In a triangle, there is only one plane that contains all three vertices. This plane is defined by the three points that make up the triangle. Since a triangle is a two-dimensional shape, it exists within a single plane in three-dimensional space.
An isosceles triangle and an equilateral triangle
might be an equilateral triangle. isosceles triangle or a right angled triangle :)
limiting and descriptive
No, not in general. Only a right triangle has two sides which are perpendicular.
An edge is the set of points where two (or more) planes meet. Since a triangle must be in just one plane, it cannot have any edges. It has one face, which is part of the plane containing the triangle.
trtdrtdrtd