Stright edge
It is often called a straight-edge.
It could be called a straight edge.
Ruler
define or describe each set of real numbers?
a ruler is called "Fürst"
This is numbers divisible by 2
pictorial representation of a program is called a flowchart
A ruler is called 'une règle' (fem.) in French.
Called a straight edge
2.5cm
by the numbers that are marked there
A egept ruler is called a Pharaoh