If lines are perpendicular to each other then \({m_1} \times {m_2} = - 1\) conversely if \({m_1} \times {m_2} = - 1\) then the lines are perpendicular to each other.

Two examples are \(y = 3x - 2\) and \(y = 3x + 11.6\). Find the equation of a straight line that is perpendicular to \(y = 2x + 1\). The gradient of \(y = 2x + 1\) is 2. The reciprocal of 2 is ...

From Tools to Symbols, a collection of twenty-seven selected papers from a South African-French conference organised in honour of the well-known palaeo-anthropologist Phillip Tobias, provides a ...

Common math symbols give us a language for understanding, well, everything from budgeting to the nature of reality itself. Its building blocks are relatively simple. Even the most sophisticated ...

This guide describes how to prepare contributions for submission. We recommend you read this in full if you have not previously submitted a contribution to Nature. We also recommend that, before ...

There are two types of Tweens in Flash, Shape Tweens, which can only operate on drawing objects, and Motion Tweens, which can only operate on Symbols. Shape tweens allow you to mutate from one drawing ...

The opposing die moves perpendicular to the long axis on the blank, pressing the thread profile into it. Since no material is removed from the blank and because the material is work hardened ...

YASIN AKGUL / Contributor / Getty Images A currency symbol is a representation of a country's currency in graphical form. It is meant as a shortcut identifier of a particular currency.

It indicates an expandable section or menu, or sometimes previous / next navigation options. PNG is a popular graphic file format, perhaps second only to JPG today. It has a few advantages over ...

Now look up for the degree symbol from the whole character map and click on Select. It will add the symbol in the text field on the bottom part of the mini window. Now click on Copy it will be ...

You know those hieroglyphic-like laundry symbols on clothing labels? They relay important cleaning information. Here's what they mean and how to use them. A picture may be worth a thousand words ...