#right triangles

[ravengirl-luca]

DELTARUNE SPOILERS AND MATH

For the record, the lake scene take place around 2:30 PM, not at Sunset

(I set the date to October 1, 2018 for simplicity since we don't have a date)

I am more then 100% sure the scene just looks like that for dramatic effect and so the shadows don't go off the screen, but I'm way to nerdy about math and stuff to care

Also pretty sure noelles shadow is putting her at a whole different time, but don't wanna do the math again + the NOAA calculator pisses me off

But yeah, the lake scene actually takes place around mid day, and not at sunset... Do what you will with this info

Bye bye \o \o

[ravewing]

ever since i learned what a hypotenuse was i have always walked the hypotenuse instead of in a right angle and i think its saved me like a million steps

[er-cryptid]

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[scarcelyodd]

Math: The Language of Physics

Let's talk about what you'll need out of math - the language of physics. #math #physics #physicsexplained

This post is all about math, because in order to go beyond purely conceptual physics, you need to be comfortable with mathematics. It’s how physicists talk to each other; it’s the language of physics.

So, what math skills do you need to successfully follow this blog? Since I’m starting out with algebra-based mechanics, you definitely need to be comfortable with algebra. You also need to know…

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[pwnthesat]

" If the points (2,a) and (14,b) are 20 units apart , what is |a -- b| ? " -- How can we use the information given in the sentence " 20 units apart " ??

This is really a right triangles question. To see why, a visual aid might help. Here’s the x = 2 line and the x = 14 line:

The straight line distance between the lines is 12. 

If we keep (2, 0) as one of our points, and move up or down on the x = 14 line, we can see the triangle form.

We know the hypotenuse must be 20, and we know one leg is 12, so we just need to solve for the other leg.

12^2 + b^2 = 20^2144 + b^2 = 400b^2 = 256b = 16

So the vertical leg must be 16 units long for the hypotenuse to be 20 units long.

(Shortcut opportunity: 12-16-20 is a Pythagorean triple—a bigger brother of the 3-4-5!)

[wolframalpha]

A good day to feel right. Happy Pythagorean Theorem Day!

https://wolfr.am/nMMhWHq2

[er-cryptid]

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[er-cryptid]

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