While only one patent model for a protractor survives in the Smithsonian collections—from an inventor with a colorful personal history—several of the other objects also provide examples of technical ...

View Protractor Face, New York, 1994 (1994) By Penn Irving; Platinum-palladium print; image: 19 5 ⁄ 8 x 19 1 ⁄ 2 in. (49.8 x 49.5 cm.) sheet mount: 24 1 ⁄ 2 x 21 3 ⁄ 4 in. ... ART GALLERIES DIRECTORY ...

A theoretical astrophysicist uses his protractor to measure the universe. From a sheet of paper to the cosmos. Lots of pictures! This post is from Observer Short List—an email of three favorite ...

Save guides, add subjects and pick up where you left off with your BBC account. A protractor is used to draw and measure angles. An angle is the amount of turn between two lines. Angles are ...