Question

2. Find the number of right angles turned through by the hour hand of a clock in each of the following
cases:
(b) when it goes from 10 to 1.
(a) when it goes from 2 to 8.
(c) when it goes from 12 to 9.​

Answer 1

The hour hand of a clock revolves by 360° or 4 right angles in one complete round.

(a) The hour hand of clock revolves by 180° or 2 right angles when it goes from 2 to 8.

(b) The hour hand of clock revolves by 90° or 1 right angle when it goes from 10 to 1.

(c) The hour hand of clock revolves by 270° or 3 right angles when it goes from 12 to 9.