Threadless T-Shirts - Profile for Ellsswhere

Ellsswhere aka Dr. Jeff Buddha'cletti is a 24.25 year old boy, has been a member since January 18, 2006, has scored 10956 submissions, giving an average score of 2.28.

URL: http://Ellsswhere@gmail.com
AIM: Ellsswhere

Mar 20 '08 by Ellsswhere

79 Comments

Watch this

Math Problem = $25 GC

So I dabble in everything to keep my adhd mind from wandering.

These are plans for a bookcase that I started on and ran into a math problem that I am sure is well within reach but I do not care to wrap my mind around.
It is a corner bookshelf built on an 8ft tall 6 inch square beam, here are the plans and what I need to know...

I need (a) and (b), where (a) = 12inches + (x)

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professorE on Mar 20 '08 at 6:43pm

Are a and b 15 3/4"?

professorE on Mar 20 '08 at 6:45pm

Wait. In the lower left of the bottom picture, the 2 3/4" is bigger that the 3 3/4".

Bramish on Mar 20 '08 at 6:45pm

Fuck. This annoys me since I was something of a child prodigy when it came to maths but hated it and now struggle with simple sums.

Good luck though ;)

Maltzmania on Mar 20 '08 at 6:46pm

Train A gets there first!

Ellsswhere on Mar 20 '08 at 6:46pm

I do not know mang... I need the correct answer or the equation that will bring me to the correct answer
I am really into conservation so the correct answer will save me from creating too much scrap wood

Ellsswhere on Mar 20 '08 at 6:47pm

yeah the drawing is all just a rough sketch i created to illustrate the geometry. sry

Bramish on Mar 20 '08 at 6:47pm

I actually just scratched my head whilst pondering over this one. I thought that only happened in cartoons.

professorE on Mar 20 '08 at 6:49pm

If the 3 3/4" measurement shown is accurate, then a and b are 15 3/4"

Bramish on Mar 20 '08 at 6:50pm

Not true.

Psot it on a maths forum. They must exist right?

littlem on Mar 20 '08 at 6:51pm

i'm over school!!

martiandrivein on Mar 20 '08 at 6:51pm

is 3.75 the height or the width?

Ellsswhere on Mar 20 '08 at 6:52pm

alright well i shall make a cardboard template with your measurements professor and if it comes out correctly i will send you your prize, thank you

if anyone else has a conflicting answer shout it out

martiandrivein on Mar 20 '08 at 6:53pm

if it is the width, and that support is a square...wouldn't x be 2.25?

BrandonB11 on Mar 20 '08 at 6:53pm

im kinda just confused about what you are exactly asking...

martiandrivein on Mar 20 '08 at 6:55pm

a would be 14.25

Ellsswhere on Mar 20 '08 at 6:57pm

let me see if i can create another illustration to better explain after i create my template

Neon Samurai on Mar 20 '08 at 7:00pm

I get 13.944544 inches

Neon Samurai on Mar 20 '08 at 7:00pm

wait, that's wrong

Neon Samurai on Mar 20 '08 at 7:03pm

A = 12.972271824 inches

dacat on Mar 20 '08 at 7:05pm

hmmmm...for the 2.75 inch diagonal doesn't seem right.
If the block was 6 inches, and one edge is 3.75 inches, the left over sides should be 2.25 inches which would give you a 3.18 inch diagonal (not 2.75). Unless I'm missing something here.

If 3.18 is the correct number, then X would be .63 inches.

If it's 2.75, then x should be .58 inches

(half the hypotenuse, then square root and divide by 2)

Of course my math is very old, who knows.

Neon Samurai on Mar 20 '08 at 7:06pm

B = 13.480541916

Neon Samurai on Mar 20 '08 at 7:07pm

assuming all your measurements are correct and everything that looks like a right angle is

Ellsswhere on Mar 20 '08 at 7:08pm

alright keep throwing them out but give me a minute to try these out and respond

BrandonB11 on Mar 20 '08 at 7:08pm

is x just 9/8" if its to the midpoint of that edge

Neon Samurai on Mar 20 '08 at 7:10pm

Actually dacat is right about your angle which makes all of my above calculations incorrect

BrandonB11 on Mar 20 '08 at 7:10pm

so A woudl be 13 and 1/8 inches but idk what B woudl be

icebar on Mar 20 '08 at 7:11pm

i found what dacat found; when you try to measure that dotted-line side two different ways, it comes out as 2.33998 and 2.25. so there is a problem...
but i will still try to figure this out!

fatheed on Mar 20 '08 at 7:11pm

you need to work in mil. That's what Brits do and we have the best carpenters in the world.

The Poles.

icebar on Mar 20 '08 at 7:11pm

or i guess that's not exactly what he found.. but yeah

fatheed on Mar 20 '08 at 7:11pm

Hadley will know the answer.

BrandonB11 on Mar 20 '08 at 7:15pm

jesus was a carpenter

id bet hed know the answer

martiandrivein on Mar 20 '08 at 7:15pm

x would be 1.2365

Neon Samurai on Mar 20 '08 at 7:16pm

Dacat is right.

Your diagonal should be 3.18.

Though I get get X = 1.124299782

Which would make A = 13.124299782

And B = 13.360981592

Again assuming everything that looks like a right angle is.

fatheed on Mar 20 '08 at 7:16pm

you need to know about hypotenuse and sine and cosine. Probably. Seriously though... woodwork in inches? it's madness.

martiandrivein on Mar 20 '08 at 7:17pm

wait my bad that was only the 3 root. the 4th root would be 1.172604.

x= that

martiandrivein on Mar 20 '08 at 7:19pm

I think. I dunno, it'd be 10x's easier if the 2 sides were 3 inches even

martiandrivein on Mar 20 '08 at 7:19pm

true that @ fatheed. america needs to adopt the metric system.

fatheed on Mar 20 '08 at 7:26pm

I'm sticking my reputation on the line here.

a = 13.125

because

x = 1.125

dacat on Mar 20 '08 at 7:27pm

Hey Neon, I think X is under an inch, since the 3.18 should be split in half (1.59), then calculated as the hypotenuse of the X sides. Square root of 1.59 = 1.26. X should be half that at .63

BrandonB11 on Mar 20 '08 at 7:28pm

BrandonB11 on Mar 20 '08 at 7:08pm
is x just 9/8" if its to the midpoint of that edge

BrandonB11 on Mar 20 '08 at 7:10pm
so A woudl be 13 and 1/8 inches but idk what B woudl be

quit copying me fatheed

fatheed on Mar 20 '08 at 7:31pm

6 - 3.75 = 2.25

The angle is a right angle, so halfway down the angle is half of the remaingin 2.25 distance... 1.125

And that to 12 to get the 13.125

Neon Samurai on Mar 20 '08 at 7:32pm

I would have thought 1.59(squared) was equal to 2 x(squared)?

fatheed on Mar 20 '08 at 7:32pm

didn;t see that Brandon, but you're right.

BrandonB11 on Mar 20 '08 at 7:32pm

what did i just tell you about copying me fatheed?

fatheed on Mar 20 '08 at 7:33pm

You don't need to square anything for the first part of the calculation.

martiandrivein on Mar 20 '08 at 7:33pm

haha @ fatheed you did it again 1/8 = .125

BrandonB11 on Mar 20 '08 at 7:33pm

lol its alright... you were far more coherent in explaining it

also this seems kinda relevent/funny
Image Hosted by ImageShack.us

martiandrivein on Mar 20 '08 at 7:34pm

fatheed on Mar 20 '08 at 7:34pm

measurements in fractions is stupid, to be honest. that's why I found it difficult to see that you'd written that, Brandon. That, and I copied you. :)

BrandonB11 on Mar 20 '08 at 7:35pm

also elsswhere cant you kinda just measure it to see how long you need a and b to be???

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