You can always extend it later. Place the protractor on the other end of the first line and mark a 50° angle up from the line with a dot. TIP: often protractors have an inner and outer scale.

you count a ruler and protractor. The Venezuelan artist crafts his illustrations using same skills you and I learned in our 10th grade geometry class. Only instead of stashing those homework ...

In it, she demonstrates how easily our humble appendages can make us look like fiddly geniuses – or at least like common math whizzes ... and a pen and lock your protractor in a drawer.

The protractor and the Bunsen ... has scales — numbers and line marks for calculations. The first one was built by William Oughtred, a cleric teaching math in England in the 1600s.

That’s the latest revelation from a study in Science Advances, which shows that carrion crows can spot geometric regularity- symmetry, parallel lines, and right angles. Two birds, no math class ...