Desmos is a great tool for visualizing the Pythagorean Theorem. To use Desmos for the Pythagorean Theorem, you can create a graph with three points: the origin (0,0), the point (a,0), and the point (0,b). Then, draw a line connecting the three points. The length of the line will be the hypotenuse of the right triangle, and the lengths of the two sides will be a and b. This will demonstrate the Pythagorean Theorem, a2 + b2 = c2.
