The Law of Sines Applet is designed
to illustrate the law of sines. The user drags three points to
define a triangle. The applet computes the length of the three
sides and the measure of the three angles. It then computes the
ratio of the length of each side to the values of the sine of the
The Triangle Middle Applet visualizes three theorems in geometry. For each theorem, you define a method of cutting a triangle in half. (Use angle bisector, or perpendicular bisector of a side, or line from vertex to midpoint of opposite side.) Each theorem says the three dividing lines all intersect in a single point. The applet lets you see this on a triangle that can be distorted and stretched. It also shows a related construction that is useful in the proof that the three lines connect in a single point.
The Adding Vectors Applet lets you visualize two vectors with their sum and difference and the vectors measured both in polar and rectangular coordinates.
The Projection, Dot and Cross Product Applet lets you visualize the projection of one vector onto another. It also gives a visualization of the dot and cross product.
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Last modified 7/25/2005