1. All triangles with equal base and equal area have equal height | Euclid's Elements Book 1 Prop 39

    All triangles with equal base and equal area have equal height | Euclid's Elements Book 1 Prop 39

    14
    3
    33
  2. All triangles with the same base and height have equal area | Euclid's Elements Book 1 Prop 38

    All triangles with the same base and height have equal area | Euclid's Elements Book 1 Prop 38

    9
    2
    9