Page 267 - ICSE Math 6

• Perimeter of a triangle = Sum of three side lengths
• Perimeter of an equilateral triangle = 3 × (Length of a side)

• Area of a square = Side × Side
• Area of a rectangle = Length × Breadth
• 1 kg = 1,000 g

• ` 1 = 100 paise
• 1 L = 1,000 mL
• 1 year = 365 days; 1 day = 24 hours; 1 hour = 60 minutes; 1 minute = 60 seconds
• 1 km = 1,000 m; 1 m = 100 cm; 1 cm = 10 mm; 1 foot = 12 inches

DATA HANDLING
Sum of all observations
• Mean or average =
Total number of observations
• Median of n observations all arranged in an order is:

 + 1 n
(i)   th observations, if n is odd.
 2 
n
  n 
(ii) mean of  th and  + 1 th observations, if n is even.

2
  2 

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