Any mathematicians?

[Jebonia]

How do you find the dimensions of a screen if you are given its diagonal length and aspect ratio? I'm guessing you would have to use trigonometry . E.G screen is 23.5 inches diagonal and aspect ratio is 16:9.

[Vitalius]

How do you find the dimensions of a screen if you are given its diagonal length and aspect ratio? I'm guessing you would have to use trigonometry . E.G screen is 23.5 inches diagonal and aspect ratio is 16:9.

16:9 is in X:Y format.

Yes, use trigonometry and the fact that a^2 + b^2 = c^2

c = 23.5

There's more to it since you have two unknowns, but good luck.

[mvitkun]

it'd be

20.5" x 11.5" 

 

pretty sure you do 

16^2 + 9^2 = c^2

18.36 = c

 

then you do 23.5/18.36

1.28

 

1.28*16

1.28*9

[Vitalius]

it'd be

20.5" x 11.5" 

 

pretty sure you do 

16^2 + 9^2 = c^2

18.36 = c

 

then you do 23.5/18.36

1.28

 

1.28*16

1.28*9

This.

I remember why I didn't do well in higher grades of math. I was a master of the basics, but I just couldn't ever remember how to do the higher level stuff (I'm talking 7th grade). And that just lead me down a path of (study the night before, forget everything later).

[mvitkun]

This.

I remember why I didn't do well in higher grades of math. I was a master of the basics, but I just couldn't ever remember how to do the higher level stuff (I'm talking 7th grade). And that just lead me down a path of (study the night before, forget everything later).

geometry is terrible for people like us.

 

first you need to remember how to solve the equation,then you need to prove that you did it right in multiple ways.

[Vitalius]

geometry is terrible for people like us.

 

first you need to remember how to solve the equation,then you need to prove that you did it right in multiple ways.

It's just, I hate repetitive-ness. I hate re-doing the same stuff over and over. 

But that's how you learn and remember math concepts. *sigh*

[Jebonia]

This.

I remember why I didn't do well in higher grades of math. I was a master of the basics, but I just couldn't ever remember how to do the higher level stuff (I'm talking 7th grade). And that just lead me down a path of (study the night before, forget everything later).

Well fuck. I'm in 10th grade and i couldn't work this out.

 

it'd be

20.5" x 11.5" 

 

pretty sure you do 

16^2 + 9^2 = c^2

18.36 = c

 

then you do 23.5/18.36

1.28

 

1.28*16

1.28*9

Why do you divide 23.5 by 18.36? What is the 18.36? Thanks for the help man. At least i know how to work it out on future. 

[mvitkun]

It's just, I hate repetitive-ness. I hate re-doing the same stuff over and over. 

But that's how you learn and remember math concepts. *sigh*

it's how you learn,nobody remembers,I hope they don't atleast....I feel for them if they do. :D

 

Well fuck. I'm in 10th grade and i couldn't work this out.

 

Why do you divide 23.5 by 18.36? What is the 18.36? Thanks for the help man. At least i know how to work it out on future. 

18.36 is the diagonal of 16 (width) 9 (height) 18.36 (diagonal)

so it's the aspect ratio (i.e 18.36) divided by the actual value  (i.e 23.5)

by doing that you get the a number which serves as a ratio, or a multiplier to get the other numbers to their actual values.

 

@Jebonia

EDIT:I'm pretty sure that in geometry it was called something like the comparative property or something like that.

your given the fact that two triangles are similar,and through that you can use ratios to find out the measurements of one through the measurements known on the other.or something along those lines.

also pretty sure @Vitalius meant that anything upwards of 7th grade is memorizing formulas and shit.

[Jebonia]

it's how you learn,nobody remembers,I hope they don't atleast....I feel for them if they do. :D

 

18.36 is the diagonal of 16 (width) 9 (height) 18.36 (diagonal)

so it's the aspect ratio (i.e 18.36) divided by the actual value  (i.e 23.5)

by doing that you get the a number which serves as a ratio, or a multiplier to get the other numbers to their actual values.

 

also pretty sure @Vitalius meant that anything upwards of 7th grade is memorizing formulas and shit.

Thanks for helping man!