Jamshīd al-Kāshī facts for kids
Quick facts for kids Ghiyāth al-Dīn Jamshīd Kāshānī |
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| Religion | Islam |
| Personal | |
| Born | c. 1380 Kashan, Iran |
| Died | 22 June 1429 (aged 48) Samarkand, Transoxania |
| Senior posting | |
| Title | al-Kashi |
| Religious career | |
| Works | Sullam al-Sama |
Ghiyāth al-Dīn Jamshīd Masʿūd al-Kāshī (also known as al-Kāshānī) was a brilliant Persian astronomer and mathematician. He lived during a time known as the Timurid Renaissance, which was a period of great learning and discovery.
Al-Kashi was born around 1380 in Kashan, Iran. He passed away on June 22, 1429, in Samarkand, which is in a region called Transoxania. His work helped shape how we understand numbers and the stars even today.
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Who Was Al-Kashi?
Al-Kashi was one of the most important scientists of his time. He lived during the rule of Tamerlane, a powerful leader who supported learning. Al-Kashi spent much of his life studying and teaching.
He was especially interested in two main subjects: mathematics and astronomy. He made many new discoveries in both fields. His ideas were very advanced for the 15th century.
A Genius in Math
Al-Kashi was a true math genius. He worked with numbers in ways that were far ahead of his time. He found new methods for solving complex math problems.
His work helped make calculations more accurate. This was important for many areas, including building and understanding the world around us.
Calculating Pi
One of al-Kashi's most famous achievements was calculating the value of Pi (π). Pi is a special number used to figure out the size of circles. He calculated Pi to an amazing 16 decimal places.
This was the most accurate calculation of Pi known for centuries. It showed his incredible skill and patience with numbers.
The Law of Cosines
Al-Kashi also helped develop the "Law of Cosines." This is a rule in trigonometry that helps you find the length of sides or angles in a triangle. It's used in many areas, like engineering and navigation.
He wrote about this law in a way that made it easier for others to understand and use.
Stargazer and Astronomer
Besides math, al-Kashi was also a dedicated astronomer. He spent many hours observing the sky. He wanted to understand how the planets and stars moved.
He worked at an observatory in Samarkand. Observatories are places where scientists watch the sky using special tools. His observations helped improve maps of the stars.
Important Books and Discoveries
Al-Kashi wrote several important books. One of his well-known works is called Sullam al-Sama. This book was about astronomy.
He also created tools to help with his studies. His inventions and writings helped future scientists learn more about the universe. Many of his works were not widely known in Europe for a long time.
Images for kids
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A manuscript of al-Kashi's al-Risala al-Kamaliya, copied in 1520.
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A page showing a theorem by Al-Kashi.
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See also
In Spanish: Ghiyath al-Din Jamshid Mas'ud al-Kashi para niños
