24 Pack plastic protractors: math protractor features an open center and accurate 6 inches ruler across the base ... the minimum accuracy of the angle is 1 degree, each 10 degrees have a clear ...

Highly optimized open source ambient lighting implementation based on modern digital video and audio stream analysis for Windows, macOS and Linux (x86 and Raspberry Pi / ARM).

Changing the ruler’s 0 origin means changing ... the tool to 45° increments. To create a protractor from an existing measuring line, Alt-drag at an angle from one end of the measuring line.