Look for arcs inside each vertex. The same number of arcs indicate equal angles. Different numbers of arcs indicate different angles. To identify the symmetry of a triangle: Count how many ways ...

The more convenient a triangle is to make, the more likely it is the correct shape you have to form to generate part of the complete Vertex picture. Once a line is formed into part of a triangle ...

The plural of vertex is vertices. The number of sides and vertices are the properties of a shape. Let’s look at the number of sides and vertices that some 2D shapes have. Here is a triangle.