Simple math learning software, with manual operation to observe the changes in the heart's four triangles.
● ● Operation Drag the vertices of a triangle with your fingers so that it changes shape. Open heart, circumcenter, center, orthocenter and other buttons to make the position shown on the screen. Operation can be observed by moving the relative positions of the four heart changes and its path! Batter twice with two fingers on the screen to show / hide menu.