9cm:p
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9cm:p
Quote:
the length of each side is 10
If half base is at the centre of the pyramid is 4Quote:
and the length of each side of the square is 8
The hypotenuse is 10
The centre of the pyramid is 90 degrees
c<sup>2</sup> = 10*10;
b<sup>2</sup> = 4*4;
a<sup>2</sup> = rise*rise;
c<sup>2</sup>=a<sup>2</sup>+b<sup>2</sup>;
100=c<sup>2</sup>;
16=b<sup>2</sup>;
84=100-16;
9.165151389911680013176094387456 = √ 84;
height = 9.165151389911680013176094387456
its too late to write this properly and do it properly:C
if your talking about the hip and not the jack Ill kill you!:o:UQuote:
the length of each side is 10
Mate he asked for the height of the pryamid not the length from the centre of one side to the apex , check out wongo's drawing
Rgds
Now wongo, if the pyramid was attached to a lathe 20mm offset at the apex and also spinning on its own, what is the rate of change of the angle between the lathe centre and one corner of the square base. (lathe going at 100rpm and box spinning at 1 rpm)
> Now wongo, if the pyramid was attached to a lathe 20m offset at the apex
< SNIP >
and box spinning at 1 rpm)
OK!!!
NOW I DO have that Headache I was thinking of earlier.
20mm offset twas meant to be:)
Dude I don't have a lathe so how would I know? :shrug:
come on now, that's an easy question. :D
The harder question would be the rate of change of the volume of the pyramid defined by base of the spinning pyramid with the spindle of the lathe as its apex. (in mm³/s)
that almost made my head explode just thinking about it:oo:
Mick, stop talking with your backside. :smack:
:Cwhats wrong with applied calculus. If ever a student asks 'What will we ever need this for?' you can tell em to work out the rate of change of volume on a spinning offset pyramid. It very useful information if you want to know that sort of thing. Even if you're not a teacher
I'll let you do it Mick.:cool:
:D
wus
the winner for the maths quizz ,sorry all l had to go after posting question ,no tell the truth l wasn't home and my little pincess rang me on the mobile so l told her to start a math thread to help her with her maths homework :)Quote:
Originally Posted by Ivan in Oz
not to talk to wongo is the only advice l was able give her on the matter of maths, turn her into some pen in top shirt pocket pen pusher, button pushing clerk:U
Care to post the math or formula? :)