Check the head-on pics in the slideshows in the external links with a protractor.
From the en.wikipedia.org
The bevel protractor is used to establish and test angles to very close tolerances.
From the en.wikipedia.org
When he set the diamond in the protractor, a display flashed 35.2 degrees.
From the online.wsj.com
The openers also worked with subtle angles you'd have to squint to find on a protractor.
From the nzherald.co.nz
I was tempted to ask them if they'd seen a protractor lying around.
From the eadt.co.uk
Over lunch with three BBFC staff, I broach the protractor question.
From the guardian.co.uk
Place the protractor on the level surface next to the pile of sand.
From the en.wikipedia.org
The accuracy of this method depends on the accuracy of the protractor used to measure the angles.
From the en.wikipedia.org
Now, a physicist has thrown her hat into the ring, arguing that it is the world's first known protractor.
From the newscientist.com
More examples
Drafting instrument used to draw or measure angles
In geometry, a protractor is a circular or semicircular tool for measuring an angle or a circle. The units of measurement utilized are usually degrees.
(Protractors) A type of various drawing or drafting tools that are used by an artist to achieve a circular look in the painting. Other tools may include triangles, compasses, T-squares, French curves, mechanical pencils and erasers.
A navigation tool used to measure angles on a chart.
A semi-circle device used for measuring angles. The edge is subdivided into degrees.
Sometimes built into a compass, this instrument allows you to determine and measure angles in degrees and is most useful when projecting magnetic lines across your map.
A protractor is an instrument for measuring angles by the displacement method. They usually have calibrated arcs as standards.
[P] touches index then thumb of [L], PO away, FO up.
A graduated, semi circular instrument for plotting and measuring angles.