Vectors · Grade 11
In Grade 11 you learn: column vectors.
A vector has both size (magnitude) and direction. Column vectors describe moves, such as (3, −2) meaning 3 right and 2 down, and bold letters stand for vectors in geometric proofs about midpoints, parallel lines and straight lines.
Key facts
- Add or subtract vectors by adding or subtracting matching components.
- Multiplying by a number k scales the length; k < 0 reverses the direction.