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  1. A
  2. A
  4. A
    • A  =  (  b  ·   h ) / 2
    • 2_3
    • A  =   1/4·b√ (4·a2-b2)
    • 2_3
  1. a
  2. a
  4. a
    • a2  =   h2  +   (b/2)2
    • 2_3
  1. b
  2. b
  4. b
    • b2  =   4 (a2  -   h2)
    • 2_3
  1. h
  2. h
  4. h
    • h2  =   a2  -   (b/2)2
    • 2_3
  1. α
  2. α
  4. α
    • sinα  =   h / a
    • 2_3
    • cosα  =   b /(2·a)
    • 2_3
  1. β
  2. β
  4. β
    • sin(β/2)  =   b /(2·a)
    • 2_3
    • cos(β/2)  =   h /a
    • 2_3
Isosceles triangle: All relevant elements

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