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Topic: Jerry Katzman, the area of the triangle
Replies: 1   Last Post: Jan 24, 2008 12:22 AM

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Alexander Bogomolny

Posts: 406
Registered: 12/4/04
Re: Jerry Katzman, the area of the triangle
Posted: Jan 24, 2008 12:22 AM
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You probably mean Heron's formula

S^2 = s(s - a)(s - b)(s - c),

where

a, b, c are the sides,
s = (a + b + c)/2, the semipermeter,
S the area of the triangle.

See, for example,

http://www.cut-the-knot.org/pythagoras/corollary.shtml#heron

A. Bogomolny



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