Final answer:
Prince Henry of Portugal promoted the development of triangular sails, invention of the compass, and improvement of maps during the European Age of Discovery.
Step-by-step explanation:
Prince Henry of Portugal, also known as Prince Henry the Navigator, promoted several scientific innovations during the European Age of Discovery. These were:
- The development of triangular sails, which allowed ships to harness the wind more effectively and travel faster.
- The invention of the compass, which helped mariners navigate accurately in open seas.
- The improvement of maps, which became more accurate and detailed, aiding in navigation.
These innovations played a crucial role in Portugal's exploration and establishment of trade routes in Africa and India, and ultimately contributed to their powerful sea empire.