Which clearer word can replace the word "right" in this context?
"Perpendicular lines: Lines that are at right angles (90°) to each other."
Which clearer word can replace the word "right" in this context?
"Perpendicular lines: Lines that are at right angles (90°) to each other."
The only equivalent replacement would be what is already given in parentheses. In other words, perpendicular lines are lines that intersect each other at 90°. You can also say perpendicular lines are lines that are square to each other, but I don't know if the replacement makes it any clearer.