This applets allows students and teachers to investigate the components of a vector. Two sliders input the x-, and y- scalar components A check box toggles the visibility of the rectangle whose diagonal is the vector in question. Two toggle buttons are provided: One toggles the angle shown [list] [*]Between vector and positive x-axis [*]Between vector and positive y-axis [*]Between vector and x-component vector [*]Between vector and y-component vector [*]No angle [/list] The other button toggles through different pairs of component-vectors. At the lower left the magnitude of the vector as well as the angle between it and the x-, and y-axes are shown.