Answer:
They do not involve any estimation but to do a specific move.
Step-by-step explanation:
A valid straightedge refers to a drawing tool used for drawing straight lines or for checking the straightness of a line.
A compass, on the other hand, is an instrument often used to measure distance or to draw lines on the radius of a circle.
Therefore, by having a specific measuring or drawing length straightedge and compass moves guarantees everyone will produce the same construction.
