A ruler is a straight edge
One-dimensional
The more common idiom is "stiff as a board," meaning "very stiff." Unless used ironically, like "straight as a crooked stick" or "straight as a politician's promise," the expression "straight as a board" would mean "very straight." When referring to "straight as..........." the term usually is as straight as a die
a straight line joining the ends of an arc
Non-linear equations represent shapes other than straight lines.Non-linear equations represent shapes other than straight lines.Non-linear equations represent shapes other than straight lines.Non-linear equations represent shapes other than straight lines.
A straight line on the Cartesian plane is the graph of a linear equation.
The medical term for straight is Heterosexual.The term for being straight, sexually, is heterosexual.
The straight edge movement had a vague begining. The term straight edge was born in Washington D.C., but there were other members of the group around the country.
The scientific term for straight is rectilinear.
If by "straight back" you mean "directly behind the aircraft" then the term is "6 o'clock" or "my/ your six".
In the 60's, a slang term used by subculture, associated with "give me the straight skinny", a narrow honest truth. Damn straight means no curves or wiggle room, just straight truth. "give me a straight answer"
Yes, that's the usual term. heterosexual = straight homosexual = gay
The Latin word for straight (in the sense of not curved) is rectus or directus.
Golf
A ruler is a straight edge
straight ;eg
A ruler is a straight edge