Learn about the different types of triangles, how to identify their angles and sides, and how to calculate their perimeter and area. Explore interactive examples and play with the dragging points to make your own triangles. This lesson explains the concept of a triangle and its properties. We will touch upon the basics of different types of triangles and also the famous Pythagorean Theorem. Let us read more about the triangle shape , the definition of a triangle , the parts of a triangle , the kinds of triangles and the properties of triangles on this page. Triangle A triangle is a 3-sided polygon. Triangle definition A triangle is a closed, two-dimensional shape that has 3 sides, 3 angles, and 3 vertices. It is the polygon with the fewest sides. Since it is the simplest form of a polygon, any polygon can be constructed using two or more triangles . Parts of a triangle The following list describes various common parts of a triangle : Side - A side (or edges or leg) of a triangle is one of the three line segments that form the triangle . Vertex ...
