Math playground.

Flip switches, watch the wires light up, and read the truth table for AND, OR, XOR, NOT, implication and friends.

Drag parameters to reshape a curve, drag a tangent to build its derivative, and watch Riemann rectangles converge on an integral.

Drag two arrows around the plane and watch length, direction, sum and dot product answer back.

Type a 2×2 matrix and see the grid bend with it — determinant, area scaling, orientation, and the collapse when det = 0.

Three draggable vertices, with sides, angles, medians, altitudes, circumcircle, incircle and every classical centre.

Rotate a point around the circle and watch it draw the sine wave beside it, one coordinate at a time.