Reasonably Difficult Question, Who can do it first.Watch

Thread starter 10 years ago
#1
For my Graphics Coursework i am going to make a model pyramid (tetrahedral), I will make all the edges 200cm long,

What will be the vertical height of the pyramid?

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10 years ago
#2
Aren't you supposed to do your coursework yourself?
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10 years ago
#3
What level are you studying at. I expect simple Trig and Pythag will work this one out.
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10 years ago
#4
Very simple trig surely, just drop a line straight down from the centre of the pyramid and link it to one of the points.

edit: the answer is itll be 173.2 cm tall though < - wrong, ignore it
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10 years ago
#5
this my be one of the quickest way to get your coursework done

*waits eagerly for others to flock and answer*
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10 years ago
#6
AFAIK, the people here will help you with a question that you are stuck on for homework, etc provided you show some effort on your part (i.e. a decent attempt and method) and maybe a small part of your coursework but they won't help you on the bulk of it.I think that is against the rules.
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Thread starter 10 years ago
#7
Thanks everyone, Much appreciated.
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10 years ago
#8
(Original post by Mithra)
edit: the answer is itll be 173.2 cm tall though
Are you sure that's right?
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10 years ago
#9
(Original post by sohanshah)
Are you sure that's right?
umm.. no it isn't I missed a step, lol, hang on

edit: new answer of 163.3cm, same as what you got?
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10 years ago
#10
Don't forget to acknowledge the TSR maths forum as a source...
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Thread starter 10 years ago
#11
(Original post by sohanshah)
Are you sure that's right?
ur past paper site got me my A in A level maths. top man.

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10 years ago
#12
(Original post by Mithra)
umm.. no it isn't I missed a step, lol, hang on

edit: new answer of 163.3cm, same as what you got?
I got 141 summin.
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10 years ago
#13
(Original post by U'llGetDuppied)
ur past paper site got me my A in A level maths. top man.

No Problem dude. I'm trying to make a better one now. Need to get some money for it first though
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10 years ago
#14
Surely it's just , no?

Edit: I've proven it with Microsoft Math Traingle Solver
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10 years ago
#15
(Original post by sohanshah)
I got 141 summin.
. I'd put my workings but they are far too odd to put on here, lol. What did you get as the distance from the centre point of the bottom layer to a corner?

edit: 20,000? the hypotenuse is 200, and then I got the base (corner to centre of bottom triangle) as about 115cm
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10 years ago
#16
163 is about right.

The formula is on wikipedia - http://en.wikipedia.org/wiki/Tetrahedron
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Thread starter 10 years ago
#17
(Original post by sohanshah)
No Problem dude. I'm trying to make a better one now. Need to get some money for it first though
ur a good guy
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Thread starter 10 years ago
#18
its 163.2 using the height formula on wikipedia
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10 years ago
#19
(Original post by U'llGetDuppied)
For my Graphics Coursework i am going to make a model pyramid (tetrahedral),
pffft.. Just one? You should do a compound of ten tetrahedra.

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10 years ago
#20
(Original post by U'llGetDuppied)
its 163.2 using the height formula on wikipedia
I'm using the wrong ****ing shape, thats why

Maybe I should go and learn my shape names: It's because you said Pyramid so I used a square bottom for mine.
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