Question

find the volume of a regular tetrahedron whose altitude measures 10cm.

Answer 1

what formula did you use?

Answer 2

hmm thank you for the answer

Answer 3

Going by what wikipedia says:
http://en.wikipedia.org/wiki/Tetrahedron
the height of the tetrahedron (altitude?) is sq root (.66666666) * edge length
edge length = height / sq root (2/3)
edge length = 10 / 0.8164965809
edge length = 12.24745
Volume = (edge length)^3 /(6 * sq root (2) )
Volume = 1,837.12 / 8.485
Volume = 216.51 cubic cm

Answer 4

wolf1728 can u explain further?

Answer 5

Notice I changed the calculations slightly
Also the formula for volume is
(edge length) ^ 3 / (6 * square root (2))

Answer 6

tnx

Answer 7

So, everything looks okay now?

Answer 8

im a bit confused but ill just understand it

Answer 9

You need the edge length to calculate the volume.
The edge length equals the altitude (or height) divided by the square root of (2/3)
The volume = (edge^3) / (6 * square root (2))

Answer 10

okay, tnx for the help :)

Answer 11

okay - glad to help out