This is a useful little Excel trig tool for helping make hologram setups. It includes four ways to solve for triangles and directions for use have a yellow background for each type of triangle solution. You can “tab” between necessary inputs for each triangle. Click the download button along bottom border to use. Use the website contact form to let us know how you like it or if you encounter any problems with it. Click on HR logo at top left of this page to return to the Home page.