Find the number of right angles turned through by the hour hand of a clock when it goes from
(a) 3 to 6 (b) 2 to 8
(c) 5 to 1 (d) 10 to 1
(e) 12 to 9 (f) 12 to 6
A clock hand makes an angle of 360° in on complete round which also made of 4 right angles.
(a) When a clock hand goes from 3 to 6 it makes only 1 right angle as it covers only one fourth of the complete revolution.
(b) When a clock hand goes from 2 to 8, it makes 2 right angles as it covers half of the complete revolution which is of 180°.
(c) When a clock hand goes from 5 to 11, it makes 2 right angles as it covers half of the complete revolution which is of 180°.
(d) When a clock hand goes from 10 to 1 it makes only 1 right angle as it covers only one fourth of the complete revolution.
(e) When a clock hand goes from 12 to 9, it makes 3 right angles as it covers three fourth of the complete revolution which is of 270°.
(f) When a clock hand goes from 12 to 6, it makes 2 right angles as it covers half of the complete revolution which is of 180°.