$\definecolor{red}{RGB}{255,0,0}$$\definecolor{black}{RGB}{0,0,0}$
  1. A
  2. A
  4. A
    • A  =  a2√3/4
  1. h
  2. h
  4. h
    • h  =  a√3/2
  1. a
  2. a
  4. a
    • a  =  2·h√3/3
Equilateral triangle: All measurements

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