Preethi

Chemistry : 1. Aluminium hydroxide on thermal decomposition gives aluminium oxide and water 2. Iron (iii) oxide reacts with carbon forming iron and carbonmonoxide 3. Hydrogen peroxide reacts with lead sulphide forming lead sulphate and water 4. Lithium reacts with nitrogen forming lithium nitride 5. Nickel sulphate reacts with sodium phosphate to form nickel phosphate and sodium sulphate 6. Silver oxide reacts with hydrogen peroxide to form silver , water and oxygen 7. Ammonia combines wuth oxygen to get nitrogen oxide and water 8. Aluminium oxide combines with sodium to form aluminium and sodium oxide 9. Calcium chloride reacts with water to give calcium hydroxide and hydrogen chloride 10. Sodium hydroxide reacts with carbondioxide forming sodium carbonate and water
Maths :
If you want you can do this or search in google for different methods
OBJECTIVE:-
To verify the Pythagoras theorem by method of Paper Folding, Cutting and Pasting

THEORY:-
Pythagoras theorem:- It states that in a right angled triangle, the square of the largest side (Hypotenuse) is equal to the sum of the squares of the other two sides(Perpendicular and the base).

PRE-REQUISITE KNOWLEDGE:-
• Area of a Square
• Construction of Parallel lines and Perpendicular bisectors
• Construction of a Right triangle

MATERIALS REQUIRED:-
Coloured Paper, A pair of Scissors, Geometry box, Sketch Pens, Fevicol

PROCEDURE:-
1) Cut out a right angled triangle ABC, with sides AC=8cm, AB=10cm, BC=6cm.
2) Cut 3 squares of dimensions 6cm x 6cm, 8cm x 8cm and 10cm x 10cm.
3) Place these squares on the sides of the triangle ABC corresponding to the sides of the square.
4) Now join the the diagonals of the square placed on the perpendicular or the base, say perpendicular.
5) Throught the intersection point of the diagonals draw a line parallel to the base of the Hypotenuse AB of triangle ABC.
6) Now draw perpendicular bisector of the line segment drawn