Add two vectors A and B tip-to-tail to get their resultant R = A + B. Drag the sliders and watch why 3 east + 4 north = 5, not 7. Toggle to the parallelogram view to see the same sum a second way.
Ax
3.00
Ay
0.00
Bx
0.00
By
4.00
Rx
3.00
Ry
4.00
Magnitude
5.00
Direction
53.1°
Vector A · magnitude3.0 u
Vector A · angle0°
Vector B · magnitude4.0 u
Vector B · angle90°
Magnitudes are in arbitrary units (u); angles in degrees, measured anticlockwise from +x. R is the diagonal in either view. Equal-and-opposite vectors sum to zero, so the direction reads “—”.