MATHEMATICS

  PYTHAGORAS THEOREM P T  

 PARALLELOGRAM PARALLELOGR AM  

  Long division method for square roots short tricks  Long division method for square roots short tricks

 trinometry https://www.slideshare.net/ThangathilakaManju1/trignometrypptx   trigonometry

 https://www.slideshare.net/ThangathilakaManju1/algebra-3pptx ALGEB RA

  Quadrilateral Formulas There are two basic formulas for quadrilaterals, that are: Area  Perimeter Area of Quadrilateral The area of the quadrilateral is the total space occupied by the figure.  The area formula for the different quadrilaterals are given below: Area of a Parallelogram Base x Height Area of a Rectangle Length x Width Area of a Square Side x Side Area of a Rhombus (1/2) x Diagonal 1 x Diagonal 2  Area of a Kite 1/2 x Diagonal 1 x Diagonal 2 Perimeter of Quadrilateral Perimeter is the total distance covered by the boundary of a 2d shape. Since we know the quadrilateral has four sides, therefore, the perimeter of any quadrilateral will be equal to the sum of the length of all four sides. If ABCD is a quadrilateral then, the perimeter of ABCD is: Perimeter = AB + BC + CD + AD Quadrilateral Name Perimeter Square 4 x Side Rectangle 2(Length + Breadth) Parallelogram 2(Base + Side) Rhombus 4 x Side Kite 2 (a + b), a and b are adjacent pairs  Important Facts of Quadrilateral A

  Fibonacci Sequence The Fibonacci Sequence is the series of numbers: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, ... The next number is found by adding up the two numbers before it: the 2 is found by adding the two numbers before it (1+1), the 3 is found by adding the two numbers before it (1+2), the 5 is (2+3), and so on! Example: the next number in the sequence above is 21+34 =   55 It is that simple! Here is a longer list: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, 1597, 2584, 4181, 6765, 10946, 17711, 28657, 46368, 75025, 121393, 196418, 317811, ... Makes A Spiral When we make squares with those widths, we get a nice spiral: Do you see how the squares fit neatly together? For example 5 and 8 make 13, 8 and 13 make 21, and so on. This spiral is found in nature! See:  Nature, The Golden Ratio, and Fibonacci The Rule The Fibonacci Sequence can be written as a "Rule" (see  Sequences and Series ). First, the terms are numbered from 0 onwards like this: n = 0 1 2 3