The teachers’ library›Coordinates and vectorsDot producta⃗⋅b⃗=∣a⃗∣∣b⃗∣cosθa⃗⋅b⃗=∣a⃗∣∣b⃗∣cosθa⃗⋅b⃗=a1b1+a2b2a⃗⋅b⃗=a1b1+a2b2a⃗⟂b⃗⇔a⃗⋅b⃗=0a⃗⟂b⃗⇔a⃗⋅b⃗=0Open on a new board The board is kept in this browser only, like your other boards. On any board, the Library button adds this too.More in Coordinates and vectorsDistance formulaMidpoint formulaSlope and equations of a lineEquation of a circleVectors: components and magnitudeCross productCoordinates in space