[4] 2016/12/28 05:46 Male / 60 years old level or over / A retired people / Useful /

Purpose of use

To transport aliens from a skewed universe into parallel ones and not change their brains.

[5] 2016/01/31 05:36 Male / 60 years old level or over / A retired people / Very /

Purpose of use

Seeking surface to volume ratio for all extremes..

[6] 2015/02/28 02:14 Male / 30 years old level / Others / Very /

Purpose of use

Iam trying to learn myself the principles of multiple variable calculus. I set up and worked out a double integral to find the volume enclosed bij the x, y, z- planes and the plane z=2-y-x. The outcome of my calculation turned out to be 4/3. I needed this tool to check if my answer was right.

[7] 2015/01/15 22:06 Male / 60 years old level or over / A retired people / Useful /

Purpose of use

Tetrahedron volume calculator To help calculate the volume of an object who's surface is a closed triangular mesh. I am currently using a different formula than you and am interested to see if it is quicker as the number of triangles gets large.

Bug report

While both Tetrahedron volume and surface area calculators produce correct results the formula dislplayed for calculating S2 in the Surface Area formulas is incorrect. It should be: S2 = (a2 + a3 + a4) / 2 and not S2 = (a3 + a3 + a4) / 2

from Keisan

Thank you for indication. Fixed.

[8] 2014/02/01 17:26 Male / 40 years old level / Others / Very /

Purpose of use

Future need studies

Comment/Request

Nice work Alvin

[9] 2013/04/12 04:33 Male / 60 years old level or over / A teacher / A researcher / Very /

Purpose of use

Area & volume of tetrahedron from edge lengths.

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