[Search for users] [Overall Top Noters] [List of all Conferences] [Download this site]

Conference rusure::math

Title:Mathematics at DEC
Moderator:RUSURE::EDP
Created:Mon Feb 03 1986
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:2083
Total number of notes:14613

384.0. "Monotone Area" by TOOLS::STAN () Wed Nov 20 1985 22:25

A reasonable-sounding theorem is this:

If each side of triangle A is larger than the corresponding
side of triangle B, then triangle A has larger area than
triangle B.

Unfortunately, this is false.  Exhibit a counter-example.
T.RTitleUserPersonal
Name
DateLines
384.1BEING::RABAHYThu Nov 21 1985 12:414
The area of the triangle with sides 3, 4 and 5 is 6, whereas one with sides
sqrt(26), sqrt(26) and 10 is 5.

	David.
384.2PIPER::REILLYThu Nov 21 1985 12:5813
In general, given a triangle with sides a, b, and c, a second triangle
can be constructed with sides  w, x, and y such that

	w = a + d
	x = b + d
	y = a + b + 2d

	Note that the second triangle has area ZERO.  If you want a 
proper triangle, subtract some epsilon from the length of y to get
and area > 0 and less than that of the first triangle.

					matt