subtend
v. (of a line) be opposite (an angle or arc). [latin: related to *tend1]
v. t. To extend under, or be opposed to; as, the line of a triangle which subtends the right angle; the chord subtends an arc.
v. (of a line) be opposite (an angle or arc). [latin: related to *tend1]
v. t. To extend under, or be opposed to; as, the line of a triangle which subtends the right angle; the chord subtends an arc.