A useable taxiway
A ruler is a straight edge
the edge
The circumference indicates the path and length around a circle, while a perimeter could be the edge (edge length) length of any regular or irregular shape, such as a square, rectangle, or triangle.
A ruler is a straight edge
On the upper edge of each side
A ruler can be classed as a straight edge.
a triangle is not a vetexs a vertexs is a edge
horizontal ruler
Called a straight edge
A Ruler
Horizontal ruler