$\definecolor{red}{RGB}{255,0,0}$$\definecolor{black}{RGB}{0,0,0}$
  1. r
  2. r
  4. r
    • r = A/s
    • r = 1/(1/ha+hb+hc)
  1. s
  2. s
  4. s
    • s = (a+b+c)/2
    • s = A/r
  1. A
  2. A
  4. A
    • A = s·r
    • A = (s(s-a)(s-b)(s-c))1/2
    • A = a·ha/2
    • A = b·hb/2
    • A = c·hc/2
  1. a
  2. a
  4. a
  1. b
  2. b
  4. b
  1. c
  2. c
  4. c
  1. ha
  2. ha
  4. ha
  1. hb
  2. hb
  4. hb
  1. hc
  2. hc
  4. hc
Circle inscribed in a triangle: radius, area, sides, heights

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