The applet demonstrates the law of sines. It shows a triangle inscribed within the unit circle.
You can drag the vertices of the triangle around to change its shape.
The size of each angle, its sine, and the length of the side opposite the angle are displayed in a table.
The table is updated in real time.

Drag the vertices of the triangle to see how the sizes of the angles, the lengths
of the sides, and the sines of the angles vary.
Note that the ratio of the length of each side and the sine of the angle opposite
that side will not vary (for the unit circle, it will always be two)