The world around us exists in 3-dimensional (3D) space. There are 3 pairs of cardinal directions: left and right, forward and backward, and up and down. All other directions are simply combinations of these fundamental directions. Mathematically, these pairs of directions correspond with three coordinate axes, which are conventionally labelled X, Y, and Z, respectively. The arrows in the diagram indicate which directions are considered numerically positive and which are negative. By convention, right is positive X, left is negative X, forward is positive Y, backward is negative Y, and up is positive Z, and down is negative Z. We shall refer to these directions as +X, -X, +Y, -Y, +Z, and -Z, respectively. The point where the coordinate axes…
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Victoria Hart, commonly known as Vi Hart, is a self-described "recreational mathemusician" who is most known for her mathematical videos on YouTube.
I copied the previous text from Wikipedia but the next few lines of text would not be from wikipedia.
Vi Hart one of the well know youtube users with 795,249 subscriptions. She's known for her interesting videos which mainly contains elements of mathematics. She can sing too!
Though you should not think of her as being deemed as a mathematician just because of her youtube channel, she has co-authored several research papers on computational geometry and mathematics of paper folding .
Her videos always motivated me to stay with maths. From the first video of Doodling in Math Class (that I saw for …Read more >