The learning process is entertaining and exciting
The solved tasks turn into coordinates
The chance to follow your progress
Along with your schoolmates and friends, go on an adventure, searching for hideouts
Polygon angle sum, convex or concaved quadrangle, polygon diagonale.
Point belongs (or not) to the straight line (beam, line segment), half-plane, crossed straight lines, beam, opposite beams, line segment, properties.
algebra tasks and task search
geometry tasks and task search