GEOMETRİC SHAPES
It was through his involvement with Lucca Pacioli on his manuscript ' De Divina Proportine ' that he gained a keen interest in geometry . It saw him devote a lot of time to the subject . Da Vinci ' s interest in geometric shapes such as the polyhedra are visible in the many sketches scattered throughout his drawings .
• For the book ' De Divina Propotione ' Da Vinci created sixty illustrations of geometric shapesbasing them on Pacioli ' s writings and models . Some of the illustrations were the first ever of polyhedra where solid edges were visible . By drawing shapes in this way , it was possible to view those edgesat the front from those that were at the back . It removed any obvious confusion that might come from a simple line drawing . Having hollow faces on the shape meant it was possible to see through the structure from the front to the back of it . The geometric illustration provided a lot of useful geometric information . In addiction to the polyhedra , Da Vinci created similar drawings for other geometric shapes . The illustrations were mostly produces in pairs . One showed the model with solis faces while the other made use of his solid edge technique .