<h1 id="circle">Circle<a aria-hidden="true" class="anchor-heading icon-link" href="#circle"></a></h1>
<img src="/assets/images/2022-12-26-09-23-31.png">
<div class="math math-display"><math xmlns="http://www.w3.org/1998/Math/MathML" display="block"><semantics><mrow><mi>π</mi><mo>=</mo><mfrac><mrow><mi>c</mi><mi>i</mi><mi>r</mi><mi>c</mi><mi>u</mi><mi>m</mi><mi>f</mi><mi>e</mi><mi>r</mi><mi>e</mi><mi>n</mi><mi>c</mi><mi>e</mi></mrow><mrow><mi>d</mi><mi>i</mi><mi>a</mi><mi>m</mi><mi>e</mi><mi>t</mi><mi>e</mi><mi>r</mi></mrow></mfrac></mrow><annotation encoding="application/x-tex">π = {circumference \over diameter}</annotation></semantics></math>π=diametercircumference​</div>
<div class="math math-display"><math xmlns="http://www.w3.org/1998/Math/MathML" display="block"><semantics><mrow><mi>A</mi><mo>=</mo><mrow><mi>π</mi><msup><mi>r</mi><mn>2</mn></msup></mrow></mrow><annotation encoding="application/x-tex">A = {πr^2}</annotation></semantics></math>A=πr2</div>
<ul>
<li>where <code>A</code> = Area of a circle; <code>r</code> = radius</li>
</ul>
A circle has about 80% of the area of a similar-width square.
<ul>
<li>The actual value is <math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mo stretchy="false">(</mo><mi>π</mi><mi mathvariant="normal">/</mi><mn>4</mn><mo stretchy="false">)</mo><mo>=</mo><mn>0.785398...</mn><mo>=</mo><mn>78.5398...</mn></mrow><annotation encoding="application/x-tex">(π/4) = 0.785398... = 78.5398...%</annotation></semantics></math>(π/4)=0.785398...=78.5398...</li>
<li>ex. a square with area of 0.16m² would correspond to a circle with area of ~0.128m²</li>
</ul>
<img src="/assets/images/2022-12-26-10-02-05.png">
<ul>
<li>A line that "just touches" the circle as it passes by is called a Tangent.</li>
<li>A line that cuts the circle at two points is called a Secant.</li>
<li>A line segment that goes from one point to another on the circle's circumference is called a Chord.
<ul>
<li>If it passes through the center it is called a Diameter.</li>
</ul>
</li>
<li>An Arc is a subsection of the diameter</li>
</ul>

Circle

thoughts-on


Welcome to my Second Brain! Here you'll find thoughts, lessons, facts and any other interesting musings that I've come across or thought up over the years. A lot of what I have gathered is originally from the minds of others, while some of it originates from myself. Some notes may contain misinformation, though I try to be rigorous with my additions.

What I have here does not necessarily reflect my thoughts and views. I collect information not based upon whether I agree with it or not, but rather when I determine it to contain some value that can be served in the future.  

You can think of this collection of inter-linked notes as my personal wiki.

This Dendron notebook is the sister vault to the tech-focused [Digital Garden](https://tech.kyletycholiz.com)

## Tags
Throughout the Second Brain, I have made use of tags, which give semantic meaning to the pieces of information.

- `ex.` - Denotes an *example* of the preceding piece of information
- `spec:` - Specifies that the preceding information has some degree of *speculation* to it, and may not be 100% factual. Ideally this gets clarified over time as my understanding develops. I try to go back after I have better understood the topic and clear out the notes of `spec:` tags
- `anal:` - Denotes an *analogy* of the preceding information. When I can, I attempt to link concepts to others that I have previously learned.
- `mn:` - Denotes a *mnemonic* to aid in memorization
- `expl:` - Denotes an *explanation*

## Resources
### UE (Unexamined) Resources
Often, I come across sources of information that I believe to be high-quality. They may be recommendations or found in some other way. No matter their origin, I may be in a position where I don't have the time to fully examine them (and properly extract notes), or I may not require the information at that moment in time. In cases like these, I will add reference to a section of the note called **UE Resources**. The idea is that in the future when I am ready to examine them, I have a list of resources that I can start with. This is an alternative approach to compiling browser bookmarks, which I've found can quickly become untenable.

### E (Examined) Resources
Once a resource has been thoroughly examined and has been mined for notes, it will be moved from *UE Resources* to *E Resources*. This is to indicate that (in my own estimation), there is nothing more to be gained from the resource that is not already in the note.

### Resources
This heading is for inexhaustible resources. 
- A prime example would be a quality website that continually posts articles- another example would be a tool, such as software that measures frequencies in a room to help acoustically treat it.
