#Basic Maths Formulas

     Relation between Indian system and International system 

               10 Lakes = 1million 
               1 Crore = 10million 
               10 Crore = 100miles
               100 Crore = 1bilion

# Meter(m) - - - - unit of length 
   Kilogram(kg) - - - - unit of weight
   Litre (l) - - - - unit of volume 
   Second (s) - - - - unit of time 

   10millimeters = 1centimeter 
   100centimeters = 1meter
   1000meters =1kilometer 
   1000 grams =1kg
   1000 Litres = 1kilolitre

# Measure
                     Type of Angle
                     0° - - Zero angle 
                   90° - - Right angle 
                 180° - - Straight angle 
                 360° - - Complete angle

@ Between 0° and 90° -- Acute angle
@ Between 90° and 180°-- Obtuse angle 
@ Between 180° and 360°-- Reflex angle 

 Perimeter :- The length of the boundary of a closed finger is called its Perimeter. 

 Perimeter of a rectangle P=2(l+b)
                                   L=length of rectangle
                                   B=breadth of rectangle 
 Perimeter of a square P=4a
                     a=length of anyside of square

 Perimeter of an equilateral triangle = 3×length of any side 
  
  Perimeter of a pentagon =5×length of anyside 

  Perimeter of a hexagon =6×length of any side

  Perimeter of a Octagon = 8×length of anyside.