Instructions
- Move the black points to change the length of segments.
- Observe the diagram for different values of \(a\) and \(b\)
(and \(c\), in case it exists).
- Figure out the identity.
- The apps contain tips to help find the identities. To see them, move from left to right the corresponding point.
- To check your solution, move from left to right the corresponding point.
Remark: After dragging a point from a slider, you may find yourself not able to deselect it. If such a situation occurs (which should be sporadic), just double click on the selected point.