PITTSBURGH (KDKA) -- Unless you're an architect or an engineer, it's probably been years since you last used a protractor in geometry class. But, now the semi-circular tool is showing up in some odd ...

ViHart's latest video reminds us once again of the value of idle hands. In it, she demonstrates how easily our humble appendages can make us look like fiddly geniuses – or at least like common math ...

What you need: ruler, protractor, pencil and paper. Use these to construct a triangle when you know the length of 1 side and the 2 angles at each end of it. In this case use the length 8 cm, and the ...