Time
Synopsis
- 4 Time is measured using a clock.
- A clock has two hand, a long hand and a short hand. The long hand is called minute hand and the short hand is called hour hand.
- Some clocks have a third hand called second hand. Generally second hand is the thinnest hand. It moves much faster than the other two hands.
Some Conversions:
- hour \[=\text{6}0\] minutes; 1 minute \[=\text{6}0\] seconds
\[\therefore \] 1 hour \[=\text{6}0\times \text{6}0=\text{36}00\] seconds; 1 day \[=\text{24}\] hours; 7 days \[=\text{1}\] week;
12 months \[=\text{1}\] year; 10 years \[=\text{1}\] decade; 10 decades\[=\text{1}\] century
\[\therefore \] 100 years = 1 century
Time Notations:
- The time 12 o'clock in the midnight is written as more...
(b) 
(c) 
more...
Perimeter of triangle
Perimeter \[=(\text{4}\times \text{S})\] units
Perimeter = 2x (Z + b) units
