# 3D Pythagoras

Watch
Announcements
This discussion is closed.
#1
Does anyone know how to do 3D pythagoras which i can apparently include in my GCSE Maths coursework to get an A*. The coursework is called Beyond Pythagoras.

0
16 years ago
#2
Imagine the point A = (x,y,z), Now we want to find the distance OA?

Now draw a line from A to meet the plane, perpendicularly, at M.

Therefore what is |OM| using pythagoras? What is |MA|? So what is |OA|?
0
16 years ago
#3
(Original post by theone)
Imagine the point A = (x,y,z), Now we want to find the distance OA?

Now draw a line from A to meet the plane, perpendicularly, at M.

Therefore what is |OM| using pythagoras? What is |MA|? So what is |OA|?
Why are you using modulus? Its GCSE...
0
16 years ago
#4
(Original post by bono)
Why are you using modulus? Its GCSE...
I think he is using it as vector notation.
0
16 years ago
#5
(Original post by capslock)
I think he is using it as vector notation.
Yes, in vector notation, |OA| means the distance from O to A as opposed to OA which could mean the distance or the vector from O to A.
0
16 years ago
#6
a man travels one mile north, one mile east, and one mile upwards, then directly home again.
try working out his total distance travelled.

you don't need any extra laws, just pythagoras.
0
16 years ago
#7
(Original post by bono)
Why are you using modulus? Its GCSE...
whats wrong with using mod in gcse?
0
16 years ago
#8
(Original post by mik1a)
a man travels one mile north, one mile east, and one mile upwards, then directly home again.
try working out his total distance travelled.

you don't need any extra laws, just pythagoras.
1 + 1 + 1 + root of (root of 2 + 1)
0
16 years ago
#9
(Original post by mik1a)
a man travels one mile north, one mile east, and one mile upwards, then directly home again.
try working out his total distance travelled.

you don't need any extra laws, just pythagoras.
3+sqrt(3)
0
16 years ago
#10
(Original post by ZJuwelH)
3+sqrt(3)
Or could it be 4+sqrt(2)...

Sod it, I got it right in the Maths Challenge, I'm knackered...
0
16 years ago
#11
lol i thought someone would pick up on that
i stole the question from smc
0
16 years ago
#12
(Original post by ZJuwelH)
Or could it be 4+sqrt(2)...

Sod it, I got it right in the Maths Challenge, I'm knackered...
0
X
new posts
Back
to top
Latest
My Feed

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

### See more of what you like onThe Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

### Poll

Join the discussion

#### What are you most likely to do if you don't get the grades you were expecting?

Go through Clearing (119)
38.39%
Take autumn exams (96)
30.97%
Look for a job (10)
3.23%
Consider an apprenticeship (9)
2.9%
Take a year out (56)
18.06%
Something else (let us know in the thread!) (20)
6.45%