Euclid's Elements: Book 1, Prop 47
Mr Bradley's step by step board presentation of Book 1, Proposition 47: "In right-angled triangles the square on the side subtending the right angle is equal to the squares on the sides containing the right angle."
Mr Bradley's step by step board presentation of Book 1, Proposition 47: "In right-angled triangles the square on the side subtending the right angle is equal to the squares on the sides containing the right angle."
