The humble combination square can be used on almost any woodworking project, and you can use it to check 45-degree or ...

Don’t you love it when the title track is the first one on the album? I had to single out this adjustable keyboard called the Protractor, because look at it! The whole thing moves, you know.

Nikon's ultimate superzoom camera returns and, while it fills a highly particular niche, it's basically alone in that niche.

make, measure and record the angles of incidence accurately using a protractor. observe and use a protractor to measure angles of refraction. Independent variable is the angle of incidence.