28 May 2023•0 j'aime•6 vues

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History of Numbers

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- 2. Number world
- 3. The numbers from 1-9 are invented by Hindu They use a board and sand to calculate sums
- 4. In ancient time people use their fingers to calculate . No one knows that who have invented this idea.
- 5. This method is Firstly used by Babul civilization. Then it is introduced in astronomy so it is called Astronomical method of calculation This method is based on 60 numbers
- 6. These numbers are used in 10th century Some numbers are also used till now
- 7. Due to trade People learned the ideas of calculation People share there ideas and method of calculation to anothers.
- 8. The decimal Fraction was up grated by Muslims
- 9. Muslims took very interest in magic box In this box the sum of all coulombs and all rows is equal to another
- 10. Muslims took interest in making shapes of numbers .
- 11. Triangles are also a geometric shape Having three corners In all tri angles the sum of all angles 180 degrees
- 12. Angles are empty space between two surfaces . Angles are calculated in degrees. In this diagram angle is represented by
- 13. Muslim researcher used the idea about angles and made shadow clock or sun clock.
- 14. Right angle is invented by the people of Egypt . They divided a rope into 12 pieces then they combine 5 pieces and 4 pieces and 3 pieces of rope .
- 15. Then they join the corners . Thus the right angle triangle invented
- 16. This is a trick in which we find the value of unknown number. In this unknown value is “x” and at last we find the value of “x” This trick is introduced by Al Khwarizmi
- 17. He is a founder of a branch of math's name algebra Algebra have many benefits
- 18. these shapes are a major part of geometry. A man who have a major part on research in this field is “Euclid”
- 19. Scale and compass are use to draw straight line and circles. When we combine these two instruments we will make many shapes of geometry.
- 20. This is a egg type shape in geometry it is called ellipse. It has simple trick to draw
- 21. Cone is a basic shape of geometry From cone we can also make other geometric shapes. The shapes are given in diagram .
- 22. Geometry is also use to making design and art. In early days builders use combination geometric shapes.
- 23. These are some samples of geometric shapes which designed on wall to make wall more attractive.
- 24. Study of light and the function of our eyes is called optics . A Muslim scientist Ibn al Haytham has research a lot in this field.
- 25. Ibn al Haytham explained that first light rays strike to a object and rays were reflected in our eyes thus the object will visible to our eyes .
- 27. When light rays enter from denser medium to rarer medium it divert its direction this process is called refraction .
- 29. •Pin hole camera is first camera in the world . •It was a dark room with a small room where the image of object will form on the opposite side of hole on wall. Pin hole camera
- 30. •In now a days leaser is a new invention in optics •It is use in hospitals as a medical apparatus •It is also use in w ray machines e.t.c leaser