Angle between two lines in space
Three-dimensional geometry and vector algebra · Mathematics
Study notes
Q: Find the angle between lines with directions (1,2,2) and (2,1,−2). d₁·d₂ = 2+2−4 = 0. cosθ = 0. The lines are perpendicular: θ = 90°.
One notebook for every subject — open it anywhere.
Three-dimensional geometry and vector algebra · Mathematics
Q: Find the angle between lines with directions (1,2,2) and (2,1,−2). d₁·d₂ = 2+2−4 = 0. cosθ = 0. The lines are perpendicular: θ = 90°.