Trigonometry close trigonometryThe study of sides and angles in triangles. can be used to find a missing angle in a right-angled triangle when two sides are known. An understanding of the three ...

Flashlights have gone through a lot of innovations since the first "modern" flashlight lit up in 1899. Invented by David Misell, the tubular flashlight used three dry cell batteries end to end, much ...

Ordinarily, if a window goes around the corner of a building, it's made of two flat panes of glass that are joined together by a metal rail or glue. Now, though, German scientists have developed a ...

The drill is perhaps the most recognizable tool in any brand's catalog of gear, and everyone who uses power tools as part of their livelihood will have one, or perhaps many, on hand. However, not all ...

Building a hot rod means working all the angles, and there are plenty of angles to work. One of the more important angles is the angle between your transmission output shaft (which is the same as the ...

It’s common to spend good money on tools you really don’t use all that often. They might eventually pay for themselves by helping you get jobs done, but the same can’t be said for most DIYers. You ...

Has anyone seen the NASA picture of Mars at Atoko Point? While everyone else was looking at the white rock, I found something below that is of more interest. While right angles can be common on ...