The images used here are taken from the Edexcel spec, but the list is the same for all. You can find an exhaustive list in the appendices to the specification published by your exam board – Edexcel (9MA0), AQA (7357), OCR (H240) and OCR/MEI (H640) – but I’m going to provide a little more explanation for the ones that you’re most likely to come across. (Note that the format is 4 hexadecimal characters.Much of the mathematical notation that you need to know for A-level, you’ll already have come across at GCSE, but there are some symbols that you may not be familiar with and others that you certainly won’t have used before studying Maths at A-level. Note that you can omit any leading zeros.) For example, in Microsoft Office applications (e.g. The important part is the hexadecimal number after the U+, which is used in various formats. (Method 7) Use the Unicode (for various, e.g. For example:Ĭtx.fillText(omCodePoint(x), 5, 5) On the assumption that you already have your canvas and the context set up, use the Hex code in the format 0x00B1 to place the ± symbol on your canvas. (Method 6) Use the HTML Hex Code (for webpages and HTML canvas). (Method 5) Use the CSS Code (for webpages). (Method 4) Use the HTML Entity Code (for webpages). (Method 3) Use the HTML Decimal Code (for webpages). When you lift the Alt key, the symbol appears. Simply hold down the Alt key and type 0177. If you have a keyboard with a numeric pad, you can use this method. It must be encoded as UTF-8 at all stages (copying, replacing, editing, pasting), otherwise it will render as random characters or the dreaded �. The easiest way to get the ± symbol is to copy and paste it into your document.īear in mind that this is a UTF-8 encoded character. Hide Instructions Codes for the ± Symbol The Symbol Are You Good at Mathematical Symbols?ĭo you know, or can you guess, the technical symbols? Well, let's see! Its ubiquitous presence ensures that ideas of uncertainty, tolerance, or dual possibilities are easily and universally understood. To wrap up, the ± symbol serves as a powerful tool in the world of mathematics and science, encapsulating the concept of variability around a central value. Its ability to concisely communicate variability is invaluable in these disciplines, ensuring clarity without verbosity. Statistics: Indicating confidence intervals or margins of error.Mathematics: Denoting dual possibilities, especially in equations with multiple potential solutions.Physics and Engineering: Signifying measurement uncertainties or tolerances.The ± symbol finds its utility across multiple domains: Representing this dual possibility compactly, the ± symbol is used. In the solution of quadratic equations, the square root component can often have both positive and negative values, leading to two potential solutions. Due to measurement uncertainties, it might be presented as \( 299,792,458 ± 1 \) m/s, indicating a potential variation of 1 meter per second either way. This is particularly useful in contexts where precision is paramount, but a value has inherent uncertainty or variability.Ĭonsider the measurement of the speed of light as \( 299,792,458 \) meters per second. The ± symbol is a compact way of representing both positive and negative deviations or directions from a given value. Let's explore the ± symbol in more detail. This symbol elegantly communicates the idea of variability, uncertainty, or tolerance around a value. Among them, the ± symbol, colloquially known as "Plus Minus", holds an important position. The lexicon of mathematical and scientific symbols is vast and varied, each with its distinct implications. The "Plus Minus" Symbol (±): Indicating Tolerance in Mathematics and Science The Mathematical Symbol "Plus minus symbol (±)"
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