Page 190 - Maths Class 05

Learning Objective : To recognise angles equal to a right angle, less than a right angle and
greater than a right angle formed by the hands of a clock at different times.

Pre-requisite : Reading a clock

Materials Required : A working clock
Procedure :
Steps 1 : Take a clock.

Steps 2 : Set the clock at 9:00, 9:10, 9:30, 9:45, 3:00 and 10:00

Steps 3 : Observe the smaller angle formed by
the two hands between them.

Observation :
Fig. 5b (1)
Complete the following table with your observations :

Angle between the hands

Time A right angle Less than a right angle Greater than a right angle

9 o’clock

9:10

9:30

9:45

3:00

10:00

Extension : You may set the clock at different times and find when the angle between the
two hands is :

a. A right angle b. Greater than a right angle c. Less than a right angle

Mathematics-5 190